CN1308143A - Electric steel plate suitable for making small core and its manufacture - Google Patents
Electric steel plate suitable for making small core and its manufacture Download PDFInfo
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- CN1308143A CN1308143A CN00137241A CN00137241A CN1308143A CN 1308143 A CN1308143 A CN 1308143A CN 00137241 A CN00137241 A CN 00137241A CN 00137241 A CN00137241 A CN 00137241A CN 1308143 A CN1308143 A CN 1308143A
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- 239000010959 steel Substances 0.000 title claims abstract description 135
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
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- 238000005096 rolling process Methods 0.000 claims abstract description 112
- 229910052742 iron Inorganic materials 0.000 claims abstract description 72
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 13
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 6
- 238000001953 recrystallisation Methods 0.000 claims description 148
- 238000000137 annealing Methods 0.000 claims description 141
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- 238000000034 method Methods 0.000 claims description 74
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- 238000010438 heat treatment Methods 0.000 claims description 36
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- 229910052757 nitrogen Inorganic materials 0.000 claims description 31
- 239000012298 atmosphere Substances 0.000 claims description 22
- 238000005098 hot rolling Methods 0.000 claims description 19
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- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 3
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- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910017082 Fe-Si Inorganic materials 0.000 description 2
- 229910017133 Fe—Si Inorganic materials 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 2
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
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- VAGJAIAXXDRUPY-UHFFFAOYSA-N dialuminum;oxido-(oxido(dioxo)chromio)oxy-dioxochromium Chemical compound [Al+3].[Al+3].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O.[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O.[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O VAGJAIAXXDRUPY-UHFFFAOYSA-N 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
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- 239000000395 magnesium oxide Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
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- QLOKJRIVRGCVIM-UHFFFAOYSA-N 1-[(4-methylsulfanylphenyl)methyl]piperazine Chemical compound C1=CC(SC)=CC=C1CN1CCNCC1 QLOKJRIVRGCVIM-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- IMHKYSZIYMGMGC-UHFFFAOYSA-K O=[Si+3]=O.[O-]P([O-])([O-])=O Chemical compound O=[Si+3]=O.[O-]P([O-])([O-])=O IMHKYSZIYMGMGC-UHFFFAOYSA-K 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 241000589614 Pseudomonas stutzeri Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
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- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 125000005619 boric acid group Chemical group 0.000 description 1
- 230000000739 chaotic effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 229940075614 colloidal silicon dioxide Drugs 0.000 description 1
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- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- KMUONIBRACKNSN-UHFFFAOYSA-N potassium dichromate Chemical compound [K+].[K+].[O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O KMUONIBRACKNSN-UHFFFAOYSA-N 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
- H01F1/14—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials metals or alloys
- H01F1/147—Alloys characterised by their composition
- H01F1/14766—Fe-Si based alloys
- H01F1/14775—Fe-Si based alloys in the form of sheets
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1227—Warm rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—Cold rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1261—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest following hot rolling
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
- C21D8/1272—Final recrystallisation annealing
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/90—Magnetic feature
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9265—Special properties
- Y10S428/928—Magnetic property
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Dispersion Chemistry (AREA)
- Soft Magnetic Materials (AREA)
Abstract
Electrical steel sheets having superior magnetic properties, anti-noise properties, and workability, are ideal for use a compact iron core material in electric apparatuses, such as compact transformers, motors, and electric generators. A totally new electrical steel sheet and a manufacturing method therefor are proposed, in which the electrical steel sheet is not only most advantageous in magnetic properties but also advantageous from economic point of view. That is, the electrical steel sheet of the present invention is composed of from about 2.0 to 8.0 wt% Si, from about 0.005 to 3.0 wt% Mn, from about 0.0010 to 0.020 wt% Al, balance essentially iron. The magnetic flux density B50(L) in a rolling direction and the magnetic flux density B50(C) in the direction perpendicular thereto are 1.70 T or more, and the B50(L)/ B50(C) is 1.005 to 1.100. In addition, the secondary recrystallized grains inclined by 20 DEG or less with respect to the (100)<001> orientation are present in the steel sheet at an areal ratio of 50 to 80%, and secondary recrystallized grains inclined by 20 DEG or less with respect to the (110)<001> orientation are present in the steel sheet at an areal ratio of 6 to 20%.
Description
The invention relates to that the main small core that is fit to electric machineries such as miniature transformer, motor, generator uses, the electrical sheet of magnetic, noise properties and excellent processability and manufacture method thereof.
The small core material first of electric machinery requires magnetic good.And then wish that noise performance is good, perhaps excellent processability.
At first, mention magnetic.The influence of orientation of crystal grain that magnetic is constituted steel plate is very big.Especially, the easy magnetization axis of crystal grain i.e. (001) direction is parallel to the steel plate face, is necessary for obtaining on the good magnetic.
The steel plate that uses as the core material of small electromechanical had in the past: (1) is generally with cold-rolled steel sheet or make the steel plate of its decarburization, (2) add Si, and minimizing impurity, and the non-oriented electromagnetic steel sheet of reduction iron loss, (3) utilize secondary recrystallization, the one-way oriented electric steel plate that crystal grain with Gauss orientation ((110) (001) orientation) is preferentially grown up, and (4) make and cube are orientated ((100) (a 001) orientation) perfect double orientation electrical sheet.
Wherein general cold-rolled steel sheet and decarburization steel plate thereof, perhaps non-oriented electromagnetic steel sheet, a little less than the improving of texture, the number of the crystal grain that (001) direction is parallel with the steel plate face is few.Therefore, compare, can not get good magnetic with oriented electrical steel.
In addition, one-way oriented electric steel plate is as the core material of transformer, is the most general use.By be orientated the one-way oriented electric steel plate that accumulative crystal grain constitutes in Gauss, easy magnetization (001) direction is assembled along the rolling direction height.Therefore, especially when rolling direction is magnetized, show good magnetic.But, in the steel plate face, also comprise the most difficult magnetized (111) direction.Therefore, when magnetizing in the direction, magnetic is extreme difference.That is, one-way oriented electric steel plate is suitable for needing only the magnetic of a direction well with regard to passable purposes as transformer.But, one-way oriented electric steel plate, it is disadvantageous that all directions in face as the core material of motor or generator are needed the use of the purposes of good magnetic.
The someone has studied by secondary recrystallization and has made a cube manufacture method of organizing perfect double orientation electrical sheet very early.For example, in the public clear 35-2657 communique of spy, disclose, utilized inhibitor to make cube orientation crystal grain carry out the method for secondary recrystallization by so-called transverse rolling.That is to say, along a direction carry out cold rolling after, again along applying cold rolling " transverse rolling ", carry out the high temperature annealing of short period of time annealing and 900～1300 ℃ with the vertical direction of this direction, make it the method for secondary recrystallization.In addition, the spy open disclose in the flat 4-362132 communique along carry out with 50～90% draft perpendicular to the hot rolling direction cold rolling after, utilize AlN to make cube orientation crystal grain carry out the method for secondary recrystallization.That is to say that after cold rolling, implementing with primary recrystallization is the annealing of purpose, then implementing with secondary recrystallization and purifying is the final finished annealing of purpose, carries out the method for secondary recrystallization.Utilize the method for these secondary recrystallizations, obtain interior (100) direction of steel plate face along rolling direction height accumulative steel plate.Therefore, rolling direction and all good perpendicular to the magnetic of rolling direction.But the direction at 45 with rolling direction becomes to embarrass magnetized (110) direction, thereby the magnetic of this direction is inferior.
By with the steel plate of (100) face, in rolling surface, there is (100) direction of easy magnetization in a large number, and do not have difficult magnetized (111) direction as the crystal formation of rolling surface.Therefore, the steel plate that uses relatively in the past, by with (100) face as the steel plate that the crystal of rolling surface constitutes, can advantageously be used in the purposes that all directions in face need good magnetic.Particularly being parallel to (100) face, (001) direction by rolling surface is the steel plate that the crystal grain of random (100) (uvw) orientation constitutes in rolling surface, does not have the anisotropy of magnetic in rolling surface fully.That is to say that the material of using as motor is an ideal.
From such understanding, up to the present tested the perfect method of (100) tissue that makes.What is called makes " the perfect method of (100) tissue " be meant " comprising in large quantities with the crystal of (100) face as rolling surface ".
For example, in the public clear 51-942 communique of spy, disclose make cold rolling draft reach 85% or above, preferably 90% or more than, 700～1200 ℃ of methods of carrying out 1 minute～1 hour long term annealing.But though this method (100) tissue after just rolling is perfect, behind the recrystallize that is produced by long term annealing, (111) tissue is also perfect.Therefore, goods can not get good magnetic.
In addition, when disclosing the recrystallize after cold rolling in the public clear 57-14411 communique of spy, control is from the γ method of the speed of cooling of the phase change zone of α phase in opposite directions.But this method causes that when recrystallize the γ phase transformation is a prerequisite, therefore can not improve to have the Si amount that makes α phase static stabilization.For example when not containing C, Mn, if the Si amount be about 2 weight % or more than, just can not cause the γ phase transformation, therefore can not use this method.That is to say that this method is can not increase reducing the disadvantageous method of the favourable Si amount of iron loss.
And then, the spy open the steel that discloses the composition that contains C0.006～0.020 weight % in the flat 5-5126 communique carry out cold rolling after, be heated to 900～1100 ℃ and carry out recrystallize, and then 900 ℃ or following method of carrying out recrystallization annealing.The magnetic that obtains by this method, according to the embodiment 1 of this communique, the magneticflux-density B of rolling direction and vertical rolling direction
50Mean value be about 1.66～1.68T.That is, can't say the concentration class height of (001) direction in the steel plate face.
As previously discussed, to the manufacture method of non-oriented electromagnetic steel sheet improved previous methods in addition, can not make (100) tissue perfect fully.That is, the improvement of magnetic is insufficient.
The representative shape of the miniature transformer that uses as stacked steel plate, known is as shown in Figure 1 EI iron core.
Use material as such EI is unshakable in one's determination, use two kinds of steel plates of non-oriented electromagnetic steel sheet and oriented electrical steel now.
When using non-oriented electromagnetic steel sheet, to compare during with the use oriented electrical steel, magnetic unshakable in one's determination is inferior.Because non-oriented electromagnetic steel sheet is lower than the steel plate magnetic levels of oriented electrical steel.But, to compare with oriented electrical steel, the manufacturing process of non-oriented electromagnetic steel sheet is simple, price is low, therefore from the viewpoint of economy, uses non-oriented electromagnetic steel sheet.
In addition, the magnetic of the rolling direction of oriented electrical steel is good, but perpendicular to the magnetic of rolling direction deterioration significantly.When using as EI is unshakable in one's determination, magnetic flux flow is crossed over rolling direction and perpendicular to the both direction of rolling direction.Oriented electrical steel is compared with non-oriented electromagnetic steel sheet, and magnetic unshakable in one's determination is good, but is not formed on using method favourable on the magnetic.
Concerning magnetic, think that all good double orientation electrical sheet of magnetic of both direction of rolling direction and vertical rolling direction is best.But method in the past in the manufacturing of double orientation electrical sheet, needs the extremely low transverse rolling of productivity.Therefore can not form the mass production of industry.In addition, the miniature transformer iron core as EI is unshakable in one's determination, magnetic flux flow is little to the influence that becomes the right angle part.That is, with the inferior double orientation electrical sheet of the magnetic of rolling direction direction at 45 also desirable material not necessarily.
As mentioned above, method conduct does not in the past provide desirable material as the core material of the miniature transformer of EI iron core.
Then mention noise performance.Recently, consider from the environment aspect especially that strict more to the restriction of noise, the noise of transformer etc. is becoming big problem.Therefore, the noise that the reduces transformer condition that necessitated.
For this reason, the manufactory of transformer keeps being concerned about greatly to the Magnetostrictive Properties of the principal element of being commonly considered as noise, is requiring material manufactory to reduce magnetostriction.Therefore, also should adapt to this requirement, the magnetostriction that reduces electrical sheet is paid big effort in material manufactory.
Magnetostriction is to be moved with rotary magnetization by 90 ° of neticdomain walls of magnetization during steel plate to cause.Therefore, reducing by 90 ° magnetic domain, is effective to lowering magnetostriction.
Oriented electrical steel, by utilize inhibitor etc. improve the crystal grain position to orientation, when improving magnetic, reach the attenuating magnetostriction.Magnetostrictive attenuating increases by 180 ° magnetic domain, has reduced by 90 ° of magnetic domains.
In order further to lower magnetic domain, attempted once implementing to give that tensile is filmed or the method for insulating coating with contact.This method is to utilize when steel plate applied tensile stress, and 180 ° magnetic domain width just narrows down, the phenomenon that 90 ° magnetic domain reduces.That is to say, be the insulating coating on the high bake steel plate, utilizes thermal expansivity poor of steel plate and insulating coating, steel plate paid add tension force, lowers magnetostrictive method.
For example, the method for using colloided silica, aluminum phosphate and chromic trioxide making tension force coating is disclosed in the public clear 53-28375 communique of spy.In addition, in the fair 5-77749 communique of spy, disclose and on steel plate, adhered to TiC, TiN and Ti (C, N) at least a kind the thin layer in and pay and add the tensile method.But these tension film and tension force coating nearly all are the glassiness or pottery, and be therefore stone, and stamping-out adds and peels off easily man-hour.Therefore, present situation is, only is used in the one-way oriented electric steel plate that requires the stamping-out processibility hardly specially, and is that the electrical sheet of important prerequisite uses hardly to the stamping-out processibility.
If the amount of the Si in the Fe-Si alloy is near 6 weight %, the magnetostriction constant lambda of Fe-Si alloy
100And λ
111It is known roughly becoming 0, magnetostrictive character does not take place.Utilize this character,, also attempting increasing the method for Si amount in order to improve Magnetostrictive Properties.
For example, open to disclose in the clear 62-227078 communique the spy Si is infiltrated in the steel plate of Si content less than 4 weight %, then make Si obtain the method for high silicon steel sheet along the diffusion of thickness of slab direction.But when Si in steel amount increased, the secondary workability of steel plate is deterioration significantly just, therefore, was difficult to be common to the stamping-out steel plate and the motor iron core made etc.And this method produces irregular when the infiltration of silicon, especially the ununiformity that almost can not ignore in the appearance of thickness of slab direction.Its result is difficult to control magnetic and magnetostriction.
In addition, open in flat 9-275021 communique and the flat 9-275022 communique of Te Kai the spy and to disclose, reach 1.5 * 10 by the magnetostrictive absolute value of the direct current that makes non-oriented electromagnetic steel sheet
-6Or below, obtain the method for low noise iron core.Write exactly in the method, reach 1.5 * 10 in order to make the magnetostrictive absolute value of direct current
-6Or below, must contain the Si of 4.0～7.0 weight %.But if contain the Si of such volume, secondary workability is deterioration significantly just.Therefore, be difficult to be applicable to the stamping-out steel plate and motor iron core of making etc.
Mention processibility at last.Especially with cube position of Miller's indices (100) (001) expression in the many steel plates of the shared ratio of crystal grain, infer processibility deterioration significantly.Such steel plate is representative with the double orientation electrical sheet, if but compare with one-way oriented electric steel plate or non-oriented electromagnetic steel sheet, the magnetic deterioration that is produced by processing is big, and this just equals the processibility deterioration.
Its reason is that the crystal grain diameter of the double orientation electrical sheet that utilizes secondary recrystallization in the past is far longer than non-oriented electromagnetic steel sheet.Therefore, add man-hour in cut-out or stamping-out, the end deforms easily, introduces big strain easily.In addition, by the pyritous finished products, form hard anodic oxidation coating based on forsterite.This hard anodic oxidation coating makes the strain of end become big.Because these strains make the magnetic deterioration.
As countermeasure, open the nonmagnetic oxide compound that has proposed to utilize minimizing surfaces such as pickling, grinding in the flat 5-275222 communique the spy.But, so not only reduced surperficial nonmetallic substance, and steel plate insulativity to each other reduced.In the case, magneticflux-density uprises, but therefore the iron loss increase is inappropriate as core material.In addition, in pickling or grinding etc., or remove oxide compound unevenly, or introduce strain, make the iron loss deterioration.
On the other hand, the same one-way oriented electric steel plate made from secondary recrystallization by forsterite tunicle and the silicon-dioxide-phosphate-based coating that forms on the surface, is paid steel plate and to be added tension force.Its result can relax the strained influence.
But, if when such tension force coating is used for the double orientation electrical sheet, though improve the magnetic of a certain direction in L direction and the C direction, the magnetic deterioration of other direction.There is deviation in the polycrystal double orientation electrical sheet of the manufacturing of industry on grain orientation.Therefore, have only the big L direction of the gathering of (001) direction and the characteristic of the some directions in the C direction, preferentially improve by the tension force coating, and the deterioration in characteristics of other direction.
About the problem of the processibility of these double orientation electrical sheets,, be the problem that is suitable for the many steel plates of ratio that cubic grain accounts for according to its mechanism.
As previously discussed, the characteristic aspect that reaches other is considered from magnetic, economically, does not also produce the electrical sheet of the small core that is specially adapted to electricapparatus at present.
The present invention has solved problem in the past effectively.Purpose is to provide not only the most favourable but also also favourable economically, new fully small core electrical sheet and manufacture method thereof of magnetic.In addition, provide noise properties electrical sheet and manufacture method thereof also good, that suppress the magnetic deterioration that produces by the processing strain simultaneously.
That is, the present invention contains Si:2.0～8.0 weight %, Mn:0.005～3.0 weight %, Al:0.0010～0.020%, and all the other are the composition of Fe basically, the magneticflux-density of rolling direction: B
50(L) with the magneticflux-density of vertical rolling direction: B
50(C) be 1.70T or more than, and B
50(L)/B
50(C) be 1.005 or above, 1.100 or following electrical sheet.In addition, in steel plate, wish to be in the position of (100) (001) orientation to difference 20 ° with interior secondary recrystallization crystal grain with 50% or above, 80% or following area occupation ratio exist, and wish to be in (110) (001) orientation to 20 ° with interior position to the secondary recrystallization crystal grain of difference with 6% or above, 20% or following area occupation ratio exist.In addition, preferably also contain and be selected from least a among Ni, Sn, Sb, Cu, Mo and the Cr.And then, in order to improve noise properties, wish the magnetostriction of rolling direction and reach 8 * 10 perpendicular to the magnetostriction sum of rolling direction
-6Or below, be in the position of (100) (001) orientation to difference 15 ° with interior secondary recrystallization crystal grain with 30% or above, 70% or following area occupation ratio exist.In addition, for the deterioration in characteristics that prevents to be produced by processing, removed the oxide amount of the iron-based surface of insulating coating, pressed the oxygen amount and convert, each face is controlled at 1.0g/m
2Or below, perhaps the oxide compound of iron-based surface and insulating coating cause tension force to steel plate, and hope is 5Mpa or following.The present invention is in addition, contain C:0.003～0.08 weight %, Si:2.0～8.0 weight %, Mn:0.005～3.0 weight %, the bloom slab of Al:0.0010～0.020% carries out hot rolling, as required, this hot-rolled sheet carries out hot-rolled sheet annealing 950～1200 ℃ or following temperature, this hot-rolled sheet or this hot-roll annealing plate are carried out once cold rolling or insert or above cold rolling for 2 times of process annealing, this cold-reduced sheet is implemented recrystallization annealing, after this, be coated with annealing separation agent as required, this recrystallization annealing plate is heated to the final finished annealing of 800 ℃ or above temperature range, again as required, this final finished annealed sheet is carried out planarization annealing, carry out the lining of insulating coating then and handle, and the method for manufacturing electrical sheet.And then wish, with the unavoidable impurities S in the bloom slab and Se be controlled at 100ppm (weight) or below, N and O be controlled at 50ppm (weight) or below, 750 ℃ of final finished when annealing or above average rate of heating are 30 ℃/h or following, and bloom slab becomes and contains at least a composition that is selected among Ni, Sn, Sb, Cu, Mo and the Cr.In addition, in order to improve noise properties, and then wish 800～1000 ℃ temperature range and be to carry out recrystallization annealing under 5 volume % or the above atmosphere at a nitrogen content.In addition, for the deterioration in characteristics that prevents to produce by processing, and then wish to make final average crystal grain diameter before cold rolling reach 200 μ m or more than, final cold rolling draft reach 60% or above, 90% or below, in dew point≤10 ℃, O
2In the atmosphere of≤0.1 volume %, carry out final finished annealing 1100 ℃ temperature, perhaps lining is handled as insulating coating, with thickness: half organic coating that 5 μ m or following lining are made of organic resin coating or organic resin and inorganic components, or with thickness: the coating of 2 μ m or following lining unorganic glass matter.
Fig. 1 is the figure of expression EI iron core shape.
Fig. 2 A is the magneticflux-density B of expression hot-rolled sheet annealing temperature to the L direction and the C direction of sheet
50Ratio B
50(L)/B
50(C) Ying Xiang graphic representation.
Fig. 2 B is the magneticflux-density B of expression hot-rolled sheet annealing temperature to the L direction and the C direction of sheet
50The graphic representation of influence.
Fig. 3 is illustrated in the sheet B
50(L)/B
50(C) to the iron loss (W of EI iron core
15/50) influence graphic representation.
Fig. 4 is illustrated in the sheet, and it is 20 ° of graphic representations with the influence of the area occupation ratio of interior crystal grain with the area occupation ratio of interior crystal grain with from the deviation angle of cube orientation that the hot-rolled sheet annealing temperature is 20 ° to sheet and deviation angle Gauss orientation.
Fig. 5 A is the figure of the iron loss of expression steel ingot A, one-way oriented electric steel plate and double orientation electrical sheet EI iron core separately.
Fig. 5 B is the figure of expression steel ingot A, one-way oriented electric steel plate and double orientation electrical sheet magneticflux-density separately.
Fig. 6 A is the magneticflux-density B of the rate of heating of 750 ℃ of expression final finished when annealing or above temperature range to the L direction and the C direction of sheet
50Ratio B
50(L)/B
50(C) Ying Xiang graphic representation.
Fig. 6 B is the magneticflux-density B of the rate of heating of 750 ℃ of expression final finished when annealing or above temperature range to the L direction and the C direction of sheet
50The graphic representation of influence.
Fig. 7 is illustrated in the sheet, the magneticflux-density B of L direction and C direction
50Ratio B
50(L)/B
50(C) to the iron loss (W of EI iron core
15/50) the graphic representation of influence.
Fig. 8 is illustrated in the sheet, and it is 20 ° of graphic representations with the influence of the area occupation ratio of interior crystal grain with the area occupation ratio of interior crystal grain with from the deviation angle of cube orientation that the rate of heating of 750 ℃ of final finished when annealing or above temperature range is 20 ° to the deviation angle from Gauss's orientation.
Nitrogen amount when Fig. 9 is expression recrystallization annealing in the atmosphere is to the figure of the secondary recrystallization rate influence of sheet.
Figure 10 is the figure of expression recrystallization annealing temperature to the magnetostriction influence of sheet.
Figure 11 is the figure of expression recrystallization annealing temperature to the secondary recrystallization rate influence of sheet.
Figure 12 be expression from the deviation angle of (100) (001) orientation be 15 ° with the figure of interior chip area rate to the magnetostriction influence of sheet.
Figure 13 is the rolling direction of expression electrical sheet and perpendicular to the figure of the magnetostriction of the rolling direction level of noise influence when excitatory.
Figure 14 is illustrated in the primary recrystallization texture of oriented electrical steel, and the position is that 20～45 ° crystal boundary is with respect to the various position figure that have frequency to crystal grain to angular difference.
To achieve the above object, the inventor conducts in-depth research repeatedly. Its result after the tentative mistake, has developed the electric steel plate of the purposes such as the most suitable miniature transformer, finishes the present invention thereby reach.
Below, with regard to experimental result explanation the present invention always.
Adopt continuous casting to make to contain C:0.010% (weight percent, or following identical), Si:2.5%, Mn:0.05%, Al:0.0080%, N:8ppm and O:12ppm, all the other are made of iron, do not contain the steel ingot A of the composition of inhibitor composition.After this bloom slab is heated to 1120 ℃,, roll into the thick hot-rolled sheet of 2.8mm by hot rolling.In 1150 ℃ nitrogen atmosphere, this hot-rolled sheet is carried out soaking in 1 minute at all temps, implement hot-rolled sheet annealing after, carry out chilling, then, carry out cold rollingly at 230 ℃, roll into the final thickness of slab of 0.35mm.This cold-reduced sheet is at hydrogen: 75 volume %, nitrogen: 25 volume %, dew point: in 35 ℃ the atmosphere, carry out 20 seconds recrystallization annealing of soaking at 920 ℃.Make C be reduced to 0.0020%.This recrystallization annealing plate carries out final finished annealing.Be heated to 750 ℃, be heated to 900 ℃ from 750 ℃ from normal temperature with 50 ℃/h, and carry out final finished annealing 900 ℃ of methods that kept 50 hours with 5 ℃/h.
Microstructure by observing the finished products plate has all been finished secondary recrystallization in any hot-rolled sheet annealing temperature as can be known.In addition, measure behind the finished products rolling direction (L) and perpendicular to the magneticflux-density (B of rolling direction (C)
50).The sheet that use obtains is made the EI iron core, measures its iron loss (W
15/50).
Expression hot-rolled sheet annealing temperature is to the magneticflux-density B of the L direction and the C direction of sheet among Fig. 2 A
50Ratio B
50(L)/B
50(C) influence, expression hot-rolled sheet annealing temperature is to the magneticflux-density B of the L direction and the C direction of sheet in Fig. 2 B
50Influence.
Shown in Fig. 2 B, when the hot-rolled sheet annealing temperature was low, the magneticflux-density of L direction was higher significantly than the magneticflux-density of C direction.But if the hot-rolled sheet annealing temperature uprises, the characteristic of C direction improves and the characteristic of L direction becomes on an equal basis.
Below, the L of expression sheet, the magneticflux-density of C direction compare B in Fig. 3
50(L)/B
50(C) to the influence of the iron loss of EI iron core.
As shown in Figure 3, at B
50(L)/B
50(C) be 1.005～1.100 scope, when promptly the magneticflux-density of L direction was higher a little than the magneticflux-density of C direction, the iron loss of EI iron core became 1.9W/kg or following good value.This is new understanding.
The contriver thinks that the change of such magneticflux-density is that difference by the texture of steel plate causes.And then use the Laue X-ray diffraction method, carry out the orientation of the secondary recrystallization crystal grain of each sheet and measure.Carry out in the zone that is determined at 100mm * 280mm, obtains the orientation of each crystal grain.
In Fig. 4, be illustrated in the sheet, the deviation angle of hot-rolled sheet annealing temperature pair and Gauss's orientation be 20 ° with the area occupation ratio of interior crystal grain (Gauss's crystal grain) and with the deviation angle of cube orientation be 20 ° of influences with the area occupation ratio of interior crystal grain (cubic grain).As known in the figure, in steel ingot A, the hot-rolled sheet annealing temperature if 950 ℃ or more than, near the crystal grain cube orientation becomes than near the state that exists of polyhybrid more of the crystal grain cube orientation.
In Fig. 2, be in the hot-rolled sheet annealing temperature of 1.005～1.100 scopes at the ratio of magneticflux-density: 950～1200 ℃, according to Fig. 4, deviation angle from cube orientation is that 20 ° of ratios with interior crystal grain are 50～80%, and keeping the deviation angle from Gauss's orientation is that 20 ° of ratios with the secondary recrystallization crystal grain of interior crystalline orientation are 6～20%.
Below, the contriver is in order to confirm above-mentioned understanding, when promptly the magneticflux-density of L direction was higher a little than C direction, the iron loss of EI iron core was the best, and electrical sheet is in the past investigated.Promptly, use and the identical thickness of slab of sheet of steel ingot A: 0.35mm, contain Si:2.5%, Gauss and be orientated the highly sheet of accumulative double orientation electrical sheet of accumulative one-way oriented electric steel plate and cube orientation, make identical EI iron core, measure the magneticflux-density of veneer and the iron loss after the assembling.Result who obtains and steel ingot A compare, and are shown among Fig. 5 A and Fig. 5 B.
As shown in Figure 5, the iron loss of EI iron core is good when using one-way oriented electric steel plate or double orientation electrical sheet when using from electrical sheet that steel ingot A obtains.Moreover the ratio of the magneticflux-density of L direction and C direction is 1.015 in steel ingot A.Relative therewith, in one-way oriented electric steel plate, be 1.331, in the double orientation electrical sheet, be 1.002, all be above-mentioned optimum range: beyond 1.005～1.100.
This result is a basis, and when the ratio of magneticflux-density that obtain in the experiment from the contriver, L direction and C direction was in 1.005～1.100 scope, when promptly L direction ratio C direction was high a little, the iron loss of EI iron core was the best.
For reference, use the Laue X-ray diffraction method, each sheet of one-way oriented electric steel plate and double orientation electrical sheet is all advanced to decide the orientation mensuration of secondary recrystallization crystal grain.100mm * 280mm zone is measured, obtained the orientation of each crystal grain.
In the sheet of one-way oriented electric steel plate, be that 20 ° of frequency that exist with interior secondary recrystallization crystal grain are 96% from the deviation angle of the Gauss of secondary recrystallization crystal grain orientation.In addition, in the sheet of double orientation electrical sheet, be that 20 ° of frequency that exist with interior secondary recrystallization crystal grain are 90% from the deviation angle of cube orientation of secondary recrystallization crystal grain.
Height-oriented gathering in the single orientation like this and the sheet of double orientation electrical sheet increases the anisotropy of magnetic significantly.When the anisotropy of magnetic is big, the iron loss deterioration that flows to the small-sized EI iron core that all directions change of magnetic flux.In contrast, as the sheet that produces by steel ingot A, have keep deviation angle from cube orientation be 20 ° perfect with interior crystal grain appropriateness, be 20 ° when mixing the texture that exists slightly from the deviation angle of Gauss's orientation with interior crystalline orientation, the iron loss of EI iron core is good.This is inferred to be, because rolling direction and good perpendicular to the magnetic of the both direction of rolling direction, and the magnetic of direction in addition reduces less.
Like this, just form following new knowledge, promptly, use steel ingot A, secondary recrystallization when annealing by final finished makes two kinds of cube tissue and Gauss's tissue to organize moderately perfect, make the magneticflux-density of rolling direction and reach 1.005～1.100, reduce the iron loss of EI miniature transformer whereby effectively perpendicular to the ratio of the magneticflux-density of rolling direction.
And then following experiment has been carried out in the influence of the rate of heating the when contriver anneals in order to understand final finished.
Steel ingot A is heated to 1150 ℃, rolls into the thick hot-rolled sheet of 2.8mm by hot rolling.In 1180 ℃ nitrogen atmosphere, this hot-rolled sheet soaking after 1 minute, is carried out chilling, carry out cold rollingly at 250 ℃, roll into the final thickness of slab of 0.35mm.This cold-reduced sheet is at hydrogen: 75 volume %, nitrogen: 25 volume %, dew point: in 35 ℃ the atmosphere, carry out 20 seconds recrystallization annealing of soaking at 920 ℃, make C be reduced to 0.0020% or below.This recrystallization annealing plate is changed the finished products of rate of heating.Promptly be warming up to 750 ℃ from normal temperature, be warming up to 900 ℃ from 750 ℃, carry out this finished products 900 ℃ of methods that kept 50 hours to carry out various rate of heating with 50 ℃/h.
Investigate to the rolling direction (L direction) of finished products plate with perpendicular to the magneticflux-density of rolling direction (C direction).In addition, use the sheet that obtains to make the EI iron core, measure its iron loss (W
15/50), re-use the Laue X-ray diffraction method, carry out the orientation of the secondary recrystallization crystal grain of each sheet and measure.100mm * 280mm zone is measured, obtained the frequency that exists that near crystal grain of cube orientation and Gauss are orientated near crystal grain.
The rate of heating of 750 ℃ of expression final finished when annealing or above humidity province is to the magneticflux-density B of L direction in the sheet and C direction in Fig. 6 A
50Ratio B
50(L)/B
50(C) influence.The rate of heating of 750 ℃ of expression final finished when annealing or above humidity province is to the magneticflux-density B of L direction in the sheet and C direction in Fig. 6 B
50Influence.
According to Fig. 6 A, be 30 ℃/h or when following in rate of heating, the ratio of the magneticflux-density of L direction and C direction be 1.100 or below.If rate of heating surpasses 30 ℃/h, the magneticflux-density of C direction reduces, and the ratio of magneticflux-density surpasses 1.100.
In addition, in Fig. 7, the influence of the iron loss of the comparison EI iron core of the magneticflux-density of expression L direction and C direction.According to Fig. 7, surpass at 1.100 o'clock at the ratio of magneticflux-density, the iron loss of EI iron core is deterioration sharp.
The result of expression investigation in Fig. 8, this result is about in sheet, the rate of heating of when final finished is annealed 750 ℃ or above humidity province to have deviation angle with Gauss's orientation be 20 ° with the crystal grain of interior crystalline orientation and with the deviation angle of cube orientation be 20 ° of influences with the area occupation ratio of interior crystal grain.
According to Fig. 8, exist rate of heating big more, near the crystal grain cube orientation reduces more, the tendency that near the crystal grain Gauss is orientated increases more.In addition, is 30 ℃/h or obtains good iron loss when following in rate of heating, but according to Fig. 8 as can be known, near the area occupation ratio of the crystal grain cube orientation is 50～80% that near the area occupation ratio of the crystal grain Gauss is orientated is in 6～20% scope.
As previously discussed, the orientation of the secondary recrystallization crystal grain of finished products plate changes with the rate of heating of 750 ℃ or above humidity province.And know, reach 30 ℃/h or following by the rate of heating that makes 750 ℃ or above humidity province, can obtain having the magneticflux-density of rolling direction and the steel plate that satisfies 1.005～1.100, the iron loss that reduces the EI iron core is had only texture perpendicular to the ratio of the magneticflux-density of rolling direction.
Then, investigated noise properties by experiment.
Adopt continuous casting manufacturing to contain C:240ppm, Si:3.24 weight %, Mn:0.14 weight %, Al:70ppm, Se:8ppm, S:11ppm, N:10ppm, O:12ppm, all the other are the bloom slab B that iron is formed basically.This bloom slab after 20 minutes, rolls into thickness of slab by hot rolling: the hot-rolled sheet of 2.6mm 1100 ℃ of heating.This hot-rolled sheet is carried out hot-rolled sheet annealing, after this, carry out recrystallization annealing again by the cold rolling final thickness of slab that rolls into 0.35mm.Recrystallization annealing is carried out at 900 ℃ soaking temperature, nitrogen amount in atmosphere carrying out under the condition of various variations.This recrystallization annealing plate is carried out finished products, as sheet.
The sheet that obtains is carried out microstructure observation.Its result as can be known, the nitrogen amount of the secondary recrystallization rate of steel plate during with recrystallization annealing changes.
Nitrogen amount when representing recrystallization annealing in Fig. 9 is to the influence of the secondary recrystallization rate of sheet.According to Fig. 9 as can be known, during less than 5 volume %, the secondary recrystallization rate is low at nitrogen amount.
Nitrogen amount during about recrystallization annealing is machine-processed not clear to the influence of secondary recrystallization rate.Be inferred to be, the nitrogenize of the steel plate that the nitrogen atmosphere during by recrystallization annealing produces has promoted secondary recrystallization.
Then, investigated of the influence of recrystallization annealing temperature to secondary recrystallization.In manufacturing processed, change the recrystallization annealing temperature and obtain sheet by bloom slab B.Nitrogen amount in the recrystallization annealing atmosphere is 50 volume %.Utilize laser Doppler method to measure the rolling direction of gained steel plate and perpendicular to the magnetostriction of rolling direction.
Expression recrystallization annealing temperature is to the rolling direction of sheet with perpendicular to the influence of the magnetostriction sum of rolling direction in Figure 10.According to Figure 10, the recrystallization annealing temperature when 800～1000 ℃ scope, rolling direction and become 7.5 * 10 perpendicular to the magnetostriction of rolling direction
-6Or following little value.
In addition, observe the microstructure of the steel plate that in this experiment, obtains.Its result as can be known, and is owing to the recrystallization temperature difference, variant on the secondary recrystallization rate.In Figure 11, expression recrystallization annealing temperature is to the influence of the secondary recrystallization rate of sheet.According to Figure 11 as can be known, when the recrystallization annealing temperature is 800～1000 ℃, secondary recrystallization takes place fully.
From above experimental result as can be known, by good secondary recrystallization, rolling direction and improve perpendicular to the Magnetostrictive Properties of rolling direction.Therefore, investigate the texture of the steel plate of secondary recrystallization below in minute detail.
In table 1, be illustrated in the sheet of making by bloom slab B, about good when carrying out secondary recrystallization, the rolling direction of recrystallization annealing condition, the sheet that obtains and be 15 ° of area occupation ratios to difference with interior crystal grain perpendicular to the magnetostriction sum of rolling direction and the position of rolling direction and (100) (001) orientation.
According to table 1 as can be known, magnetostriction is 8.0 * 10
-6Sheet, the position of rolling direction and (100) (001) orientation is that 15 ° of area occupation ratios with interior crystal grain are in 30～70% scope to difference.
And then by the bloom slab that various compositions are, with identical the making of sheet that is produced by bloom slab B, the steel plate of secondary recrystallization is carried out in investigation well.In Figure 12 the position of expression and (100) (001) orientation to difference be 15 ° with the magnetostrictive influence of the area occupation ratio of interior crystal grain to sheet.
According to Figure 12 as can be known, with the position of (100) (001) orientation when difference is 15 ° of scopes with the area occupation ratios satisfied 30～70% of interior crystal grain, rolling direction and be 8.0 * 10 perpendicular to the magnetostriction sum of rolling direction
-6Or below.
Though should mechanism not necessarily clear, can consider like that by following.(100) direction to rolling direction and perpendicular to the concentration class of rolling direction less than 30% o'clock, 180 ° magnetic domain reduces, and magnetostriction increases.On the other hand, surpass in (100) direction at 70% o'clock in the concentration class of rolling direction, because concentration class is too high, (010) direction also raises to the concentration class perpendicular to rolling direction, and the magnetic domain that its result is 90 ° increases.
In order to estimate rolling direction and, to carry out following experiment perpendicular to the influence of the magnetostriction sum of the rolling direction level of noise when excitatory.From oriented electrical steel and non-oriented electromagnetic steel sheet stamping-out diameter with various Magnetostrictive Properties: the ring-shaped sample of 150mm, 750 ℃ of stress relievings of carrying out 2 hours.The annealed ring-shaped sample is stacked, make iron core.With frequency: 50Hz, that magnetizing flux density: 1.5T carries out these iron cores is excitatory, measures noise with the speaker of 100mm position directly over unshakable in one's determination.
The rolling direction of expression electrical sheet and in Figure 13 perpendicular to the influence of the magnetostriction sum of the rolling direction level of noise when excitatory.According to Figure 13 as can be known, magnetostrictive and be 8.0 * 10
-6Or when following, noise be reduced to 40 decibels or below.
Though should mechanism not necessarily clear, can as following, consider.In the occasion of small core, excitatory direction not only relates to the rolling direction of steel plate, also relates to all directions of steel plate.Therefore, much less rolling direction and worsen perpendicular to the Magnetostrictive Properties of rolling direction, it is big that noise also becomes.Even the Magnetostrictive Properties of rolling direction is good, if worsen perpendicular to the Magnetostrictive Properties of rolling direction, just big perpendicular to the magnetostriction of rolling direction, it is big that noise also becomes.
In addition, make the processibility optimizing according to following understanding.
Make the oxide compound of the surface of steel plate of processing strain increase, mainly form by finished products.Finished products is with secondary recrystallization with to contain the isochronous purifying of AlN as inhibitor be purpose.Finished products carries out at 1200 ℃ high temperature usually, therefore can not avoid the oxidation of iron-based body composition.In addition, high temperature, the distortion of steel plate is just big more, the adhesion to each other of also easy more generation steel plate.Therefore, the annealing separation agent that needs volume.
But annealing temperature is high more, and the oxide compound that forms at surface of steel plate increases more.In addition, annealing separation agent is many more, owing to be included in moisture or oxygen in the annealing separation agent, the oxide compound that forms at surface of steel plate is increased.
Therefore, if from the composition of steel, remove the inhibitor composition that needs purifying, the purifying when just not needing finished products in advance.That is to say, annealing temperature is reduced, just the generation of possibility inhibited oxidation thing.
The contriver has explored the method that the Si steel obtains the secondary recrystallization tissue of cube orientation that contains that never contains the inhibitor composition.That is, as starting material, carry out the experiment of hot rolling, hot-rolled sheet annealing, cold rolling, recrystallization annealing and finished products repeatedly with the bloom slab that reduces inhibitor compositions such as Al, O, N, S, Se.
Its result has developed by in cube manufacture method of the double orientation electrical sheet of orientation accumulative secondary recrystallization organizational composition, is willing to propose in the flat 11-289523 specification sheets the spy.
Then, the contriver is to improving above-mentioned technology, exploring in stamping-out processing back magnetic deterioration condition few, that can obtain good iron core characteristics.At first be conceived to the surface, when the oxide on surface amount was lowered more, the baneful influence that the tension force of getting rid of such oxide compound and coming the insulating coating of comfortable surface-coated shaping to give produces reached the raising more of magnetic.For this reason, make finished products atmosphere carry out various variations, and manufacture the kind of the insulating coating that changes lining and the sheet of thickness.Make small-sized EI iron core from sheet by stamping-out, estimate its magnetic.
Its result after tentative mistake, develops under the condition of the oxide compound of iron-based described later surface and insulating coating, even after stamping-out processing, also can obtain the electrical sheet of good iron core characteristics.
From experimental result as can be known, by form with cube tissue as main body, make Gauss organize a small amount of perfect texture, the magneticflux-density of rolling direction and become 1.005～1.100 perpendicular to the ratio of the magneticflux-density of rolling direction becomes best tissue as the material of EI iron core.About its reason, though not necessarily clear, it is as follows that the contriver thinks.
As obtaining creating conditions of such texture, it is effective containing in starting material about C:0.003～0.08%.Because the influence of solid solution C, cross slip increases when rolling, promotes the formation of deformation bands, and the recrystallization nucleus that makes cube orientation crystal grain or Gauss be orientated crystal grain increases.In addition, the rolling temperature of at least 1 passage when cold rolling rises to 100～250 ℃, and cross slip is increased, and promotes the formation of deformation bands, is effective to increasing the recrystallization nucleus that cube orientation crystal grain or Gauss be orientated crystal grain.
Such as according to previous described experiment understanding, it is effective carrying out hot-rolled sheet annealing 950～1200 ℃ temperature ranges.It is believed that in the case, cold rolling preceding crystal grain becomes thick, has suppressed the formation from the recrystallization nucleus of crystal boundary, (111) covering weave after the recrystallization annealing reduces.(111) covering weave is orientated crystal grain consumption by Gauss easily, and is therefore generally known, and preferentially to carry out secondary recrystallization useful to making Gauss be orientated crystal grain.Therefore thinking, reduce (111) covering weave, is effective to the secondary recrystallization crystal grain that lowers Gauss's orientation.
In addition, grain growth especially preferentially takes place in (100) (011) orientation crystal grain after hot-rolled sheet annealing.And, should (100) (011) orientation crystal grain be when cold rolling, to be orientated indeclinable stable orientations.Even so behind recrystallize, (100) (011) orientation also increases.And know that (100) (011) orientation crystal grain is difficult to be orientated crystal grain by Gauss and nibbles.Therefore think that the increase of (100) (011) orientation suppresses Gauss and is orientated growing up of crystal grain, replace that cube orientation crystal grain is preferentially grown up.
In addition, known to have following tendency that promptly, the rate of heating when final finished anneal hour mainly is that cube to be orientated crystal grain perfect, when rate of heating was big, it is perfect that Gauss is orientated crystal grain.It is believed that, this be because, rate of heating is for the influence of latent period to the beginning of growing up of secondary recrystallization crystal grain, the difference along with crystalline orientation.But the mechanism of essence it be unclear that.
In the present invention, even, also find the reason of secondary recrystallization about using the steel ingot that does not contain the inhibitor composition, can be as following consideration.
About (110) (001) orientation crystal grain, promptly Gauss is orientated the mechanism of crystal grain generation secondary recrystallization, and up to the present the contriver has carried out deep research repeatedly.It found that, the position in the primary recrystallization tissue is that 20～45 ° crystal boundary plays important effect to difference, has carried out reporting (Acta Materialvol.45, p85 (1997)).So-called position is meant for the necessary minimum rotation angle of the lattice that repeats adjacent crystal to difference.
In Fig. 4, expression is for the crystal boundary that keeps around various grain-oriented each crystal grain, about being the result that 20～45 ° all ratios (%) of crystal boundary are investigated to the crystal boundary position to difference.Resolved to as if, oriented electrical steel be about to primary recrystallization tissue before the secondary recrystallization.
Use in Figure 14 is that the Ф 2=45 ° section of Eulerian angles (Ф 1, Ф, Ф 2) is represented the crystalline orientation space.In Figure 14, schematically represent main orientations such as Gauss's orientation.
According to Figure 14, about be orientated in Gauss position around the crystal grain to difference be 20～45 ° crystal boundary have a frequency, Gauss is orientated the highest frequency of maintenance.According to the experimental data ((1949) 368 pages of AIMETransaction 188 volumes) that C.G.Dunn etc. obtains, the position is that 20～45 ° crystal boundary is the high energy crystal boundary to difference.Freeboard in the high energy crystal boundary, crystal boundary is big, forms chaotic configuration.The crystal boundary diffusion is the process that is moved by the crystal boundary atom.Therefore, the high energy crystal boundary that the freeboard in the crystal boundary is big, the crystal boundary diffusion is rapidly.
Following growing up that the diffusion control of the precipitate that is called inhibitor causes, secondary recrystallization takes place, is well-known.Precipitate on the high energy crystal boundary preferentially carries out alligatoring in finished products.That is to say, move, just begin crystal boundary and move, Gauss's grain growth if pinning preferentially takes place at the high energy crystal boundary.
The contriver has further developed described research.It found that the factor of the essence of secondary recrystallization is the distribution of the high energy crystal boundary in the primary recrystallization tissue.But also find that the effect of inhibitor is that the translational speed of generation high energy crystal boundary and other crystal boundary is poor.
Therefore, poor by the translational speed that produces crystal boundary according to this theory even do not use inhibitor, also secondary recrystallization can take place.
Be present in the impurity element in the steel,, be segregated in the high energy crystal boundary especially significantly easily at grain boundary segregation.Therefore think that when containing impurity element on volume ground, the translational speed that does not produce high energy crystal boundary and other crystal boundaries is poor.
Therefore, by raw-material high purityization, if get rid of the influence of such impurity element, the secondary recrystallization that Gauss is orientated crystal grain just becomes possibility.This is significantly to change because can expect the original translational speed difference that exists with ... the high energy grain boundary structure.
Based on above investigation, the contriver has found out, even in the bloom slab that does not contain the inhibitor composition, also secondary recrystallization can take place by raw-material high purityization.
Do not use in the present invention under the situation of technology of inhibitor, the orientation of secondary recrystallization crystal grain also comprises near orientation (100) (001).That is, to carry out the technology of secondary recrystallization different with containing inhibitor.
When not containing inhibitor, after the hot rolling or the crystal structure alligatoring significantly after the hot-rolled sheet annealing.Therefore, be inferred as, caryogenic (111) covering weave reduces during recrystallization annealing after cold rolling.Known (111) covering weave is as helping the tissue that Gauss is orientated grain growth.Be inferred as, because such tissue reduces, (100) (001) orientation crystal grain replaces Gauss to be orientated crystal grain, and secondary recrystallization takes place.But essential is machine-processed not clear.
The qualification reason of formation essential condition of the present invention then, is described.
At first, from improving the aspect of magnetic, the reason that determinant is formed is described.
Si：2.0～8.0％
Si is raising resistance, improves the useful element of iron loss.If content less than 2.0%, lacks this effect of improving, and the γ phase transformation takes place.Because the γ phase transformation becoming phase-change organization after the hot rolling and after the final finished annealing, can not get good magnetic.On the other hand, if the Si amount surpasses 8.0%, the secondary workability of goods worsens, and then saturation magnetic flux density also reduces.Therefore, the Si amount is limited in 2.0～8.0% scope.
Mn：0.005～3.0％
Mn is in order to improve the necessary element of hot workability.Less than 0.005% o'clock, lack its additive effect at Mn.On the other hand, if surpass 3.0%, it is difficult that secondary recrystallization becomes.Therefore, the Mn amount is limited in 0.005～3.0% scope.
Al：0.0010～0.020％
In the present invention, by contain Al micro-ly, the secondary recrystallization when showing finished products well makes cube orientation crystal grain moderately perfect.But, if content less than 0.0010%, the concentration class of cube orientation and Gauss orientation just reduces, magneticflux-density reduces.On the other hand, even surpass 0.020%, the concentration class of cube orientation and Gauss's orientation reduces too, can not get desirable magnetic.Therefore, the scope that is defined as with 0.0010～0.020% of Al contains.
The Al of trace forms compact oxide on the top layer, though think the effective function of bringing into play of surface oxidation when suppressing finished products or nitrogenize, also not fully aware of.
In the present invention, as composition of raw material, should lower nitrogen as far as possible.Therefore, with in the past to carry out the manufacture method of one-way oriented electric steel plate of secondary recrystallization as inhibitor with AlN different.
Se and S preferably are respectively 100ppm or following, and O and N preferably are respectively 50ppm or following.Because Se, S, O and N greatly hinder the generation secondary recrystallization.And be to remain in the harmful element that makes the iron loss deterioration in the iron-based body.Se and S are more preferably 50ppm or following, preferably 30ppm or following.In addition, O and N 30ppm or following preferably.These elements all are difficult to remove in afterwards the operation, therefore are preferably in the molten steel composition and reduce in advance.
More than, necessary composition and restriction composition have been described, but in the present invention, in addition, can have suitably contained the element of the following stated.
At first, can add Ni in order to improve magneticflux-density.But, if addition less than 0.01 weight %, the raising amount of magnetic is little.On the other hand, if surpass 1.50 weight %, improving of secondary recrystallization crystal grain is insufficient, the magnetic that is not being met.Therefore, addition is defined as 0.01～1.50 weight %.
In addition, in order to improve iron loss, can add Sn:0.01～1.50 weight %, Sb:0.005～0.50 weight %, Cu:0.01～1.50 weight %, Mo:0.005～0.50 weight %, Cr:0.01～1.50 weight %.At the addition of these elements all after a little while, do not improve the effect of iron loss than above-mentioned scope.On the other hand, at addition for a long time, secondary recrystallization crystal grain imperfection causes the deterioration of iron loss.Therefore, be defined as above-mentioned addition.
In the present invention, and then about rolling direction (L direction) with perpendicular to the magneticflux-density B of rolling direction (C direction)
50Must satisfy following scope.
That is, the magneticflux-density of L direction and C direction is B simultaneously
50〉=1.7T, and indispensable be that their magneticflux-density compares B
50(L)/B
50(C) be controlled at 1.005 or above, 1.100 or following scope.This is in order to reduce the iron loss as the miniature transformer of EI iron core especially effectively.
Magneticflux-density B
50During less than 1.70T, magnetic hysteresis loss increases, and iron loss worsens.In addition, B
50(L)/B
50(C) exceed 1.005 or above, 1.100 or during following scope, the iron loss of the part of inner direction of magnetization rotation unshakable in one's determination increases, whole iron loss unshakable in one's determination worsens.Therefore, magneticflux-density must satisfy above-mentioned condition.
In addition, in order to obtain the above-mentioned magnetic of picture, the orientation that control constitutes the crystal grain of sheet is effective.
Promptly, orientation about the crystal grain that constitutes steel plate, importantly, from the position of cube orientation to difference be 20 ° of area occupation ratios with interior crystal grain be 50% or above, 80% or below, and from Gauss orientation to difference be 20 ° of area occupation ratios with interior crystal grain be 6% or above, 20% or following scope.By reaching such texture, can be effectively simultaneously the magneticflux-density of L direction and C direction be controlled at B
50〉=1.7T, and with B
50(L)/B
50(C) be controlled at 1.005 or above, 1.100 or following scope.
Then, limit reason from the aspect explanation that improves noise properties.
The position that is orientated with (100) (001) is 15 ° of area occupation ratios with interior crystal grain to difference: 30～70%
With the position of (100) (001) orientation to difference be 15 ° of area occupation ratios with interior crystal grain less than 30% o'clock, (100) orientation is to rolling direction with perpendicular to the concentration class step-down of rolling direction, the Magnetostrictive Properties deterioration of these directions.On the other hand, if area occupation ratio surpasses 70%, rolling direction and increase perpendicular to the magnetostriction of rolling direction.And if (100) (001) orientation is assembled to heavens, (110) orientation is assembled with regard to edge and rolling direction direction at 45, causes the deterioration of magnetic in small-sized electricapparatus iron core.This is because though rolling direction and good perpendicular to the magnetic of rolling direction, in the direction at 45 with rolling direction, magnetic is deterioration significantly.
Because such reason, the position that is orientated with (100) (001) is that 15 ° of area occupation ratios with interior crystal grain are defined as 30～70% to difference.
With the interchange of 50Hz, 1.5T carry out when excitatory rolling direction and perpendicular to the magnetostriction sum of rolling direction: 8 * 10
-6Or below
Magnetostriction is the major cause of noise.This be because, if with the interchange of 50Hz, carry out the rolling direction when excitatory and surpass 8 * 10 perpendicular to the magnetostriction sum of rolling direction at 1.5T
-6, it is very big that noise just becomes.
In addition, the reasons are as follows for the limiting of essential condition that constitute of the deterioration that prevents to cause by processing.
Importantly, the oxide compound of surface of steel plate is pressed the oxygen amount and is converted, and each face is suppressed at 1.0g/m
2Or below.This oxide on surface mainly forms when finished products.
Press the oxygen amount and convert, if oxide amount surpasses 1.0g/m
2, cut off or stamping-out to add the distortion of cut surface in man-hour big.That is to say, around cut-out portion, import big strain, and cause iron loss deterioration significantly.
This oxide compound be in the steel composition and annealing separation agent composition separately or composite oxides.Mainly be forsterite, silicon-dioxide, aluminum oxide, magnesium oxide or their spinel type compound.
Such oxide compound also forms in thermal treatments such as decarburizing annealing or planarization annealing except finished products.But, also comprise this occasion, convert by final oxygen amount, must be suppressed at 1.0g/m
2Or below.
In addition, in order to improve insulativity, must lining form insulating coating in the iron-based surface.The total tension force that the iron-based body is applied about the oxide compound on surface and this insulating coating, preferably 5MPa or following.This be because, if this tension force greater than 5MPa, the magnetic deterioration of the direction that the concentration class of (100) in L direction and C direction orientation is low.
In order to make this tension force little, it is effective making the thickness of oxide compound and insulating coating little, using the low material of storing temperature, make hot exapnsion coefficient or the little insulating coating of Young's modulus as insulating coating material.
Below, manufacture method of the present invention is described.
At first, composition of raw material is described.
C:0.08 weight % or following
C promotes intragranular local deformaton, promotes cube and Gauss's tissue perfect, and be effective to improving magnetic.If content is less than 0.003%, the generation effect of deformation bands is little, thereby magneticflux-density reduces.On the other hand, if surpass 0.08%, when recrystallization annealing, be difficult to remove.And when hot-rolled sheet is annealed, cause the γ phase transformation of part, be difficult to make cold rolling preceding grain coarsening.Therefore, the C amount is limited to 0.003～0.08% scope.
About composition of raw material in addition, identical with qualification reason about goods.
Adopt common ingot casting method or Continuous casting process, casting is adjusted to the molten steel that above-mentioned optimal components is formed, and forms bloom slab.In addition, also can use direct casting, directly make the thin strand of 100mm or following thickness.
Bloom slab carries out hot rolling after heating with usual method.Moreover also reheat not after the casting is directly supplied with hot rolling.In addition, when casting, also can omit hot rolling with thin strand.
The Heating temperature of bloom slab can the hot rolled minimum temperature promptly about 1100 ℃ just enough.Because in composition of raw material, do not contain inhibitor, therefore do not need heat so that the inhibitor solid solution.
Then, hot-rolled sheet is implemented hot-rolled sheet annealing.Moderately perfect for cube tissue and Gauss are organized in the sheet, the hot-rolled sheet annealing temperature must reach 950 ℃ or above, 1200 ℃ or following.In the hot-rolled sheet annealing temperature during less than 950 ℃, the not alligatoring of crystal grain before cold rolling, the perfect reduction of cube tissue in the sheet and Gauss's tissue can not get desirable magnetic.On the other hand, if surpass 1200 ℃, the perfect reduction of Gauss's tissue of sheet, the anisotropy deterioration of magneticflux-density.Therefore, the hot-rolled sheet annealing temperature must reach 950 ℃ or above, 1200 ℃ or following.
After the hot-rolled sheet annealing, as required, insert or above cold rolling for 1 time of process annealing, take into account the recrystallization annealing of decarburization then.In recrystallization annealing, C is reduced to do not cause the 50ppm of magnetic aging or following, preferably be reduced to 30ppm or following.
Hot-rolled sheet annealing is useful to improving magnetic.Equally, adding process annealing between cold rolling, is useful to the stabilization of magnetic.But these two kinds of technologies all make production cost raise.Therefore, the choice selection and the decision of annealing temperature and time of hot-rolled sheet annealing or process annealing are depended on consideration economically and are made the primary recrystallization crystal grain diameter reach the necessity of proper range.
For (100) (001) tissue is grown up, importantly, make final average crystal grain diameter before cold rolling reach 200 μ m or more than, and make draft reach 60～90% scope.In addition, so cold rollingly carry out 150 ℃ or above temperature is effective on the secondary recrystallization that cube orientation takes place.In addition, also can use rolling condition cold rolling that enlarges width of steel band with transverse rolling or low-tension.
Recrystallization annealing as mentioned above, less than 800 ℃, or when surpassing 1000 ℃, all hinders the carrying out of secondary recrystallization in annealing temperature.In addition, the nitrogen amount is less than 5 volume %, also to the ill effect that brings of secondary recrystallization.If do not carry out secondary recrystallization, the crystal grain of orientation of all kinds exists in a large number, thereby the Magnetostrictive Properties deterioration.Therefore, in the present invention, be to carry out recrystallization annealing under 5 volume % or the above condition in 800～1000 ℃ temperature range and the nitrogen amount in atmosphere.
After final cold rolling back or the recrystallization annealing, also can and use the technology that increases the Si amount by the siliconising method.
After this, as required, use annealing separation agent.As annealing separation agent, only is the slurry or the colloidal solution of refractory body powder such as silicon-dioxide, aluminum oxide, magnesium oxide.In addition, preferably adopt dry type coating methods such as electrostatic applications to make these refractory body powder attached to the method on the steel plate.Because in finished products atmosphere, do not comprise moisture.And then, utilize spraying plating etc. to make these refractory bodies be inserted in the method that the surface forms the steel plate of coating and also can use.
Then, by implementing final finished annealing, it is perfect that secondary recrystallization is organized.
Epochmakingly in final finished annealing be, make the average rate of heating of 750 ℃ or above humidity province reach 30 ℃/h or following, be heated to 800 ℃ or above temperature, and kept 10 hours or more than, orientation tissue and Gauss are orientated be organized in the sheet perfect.If 750 ℃ or above average rate of heating surpass 30 ℃/h, a cube tissue reduces, and Gauss organizes increase, can not get desirable magnetic.Moreover, magnetic is not produced big influence to 750 ℃ rate of heating, therefore can be condition arbitrarily.In addition, if the temperature that should control heating less than 800 ℃, improving of secondary recrystallization crystal grain is insufficient, the magnetic deterioration.Therefore, such control heating must proceed to 800 ℃ or more than.
And then, even for secondary recrystallization crystal grain improve and unnecessary, but must be with the occasion of forsterite tunicle as end tunicle, it be no problem being heated to about 1100 ℃.
In order to improve processibility, the oxide compound that forms in the iron-based surface is pressed the oxygen amount and is converted, and each face must be defined as 1g/m
2Or below.For this reason, finished products atmosphere must be dew point≤10 ℃, O
2≤ 0.1 volume %.In addition, for the generation of inhibited oxidation thing, the finished products temperature must be 1100 ℃ or following, preferably 900 ℃ or following.For such finished products temperature limit is fixed on 900 ℃ or following,, therefore preferably Al is limited in less than 0.01 weight % because the temperature that secondary recrystallization takes place is reduced.
When using in stacked steel plate, after the final finished annealing, in order to improve iron loss, it is effective implementing insulating coating at surface of steel plate.
For this purpose, insulating coating can be the multilayer tunicle that is made of 2 kinds or above tunicle, and also can impose the coating of hybrid resin etc. according to purposes.
And then, be effective based on the insulating coating of giving tensile phosphoric acid salt to reducing iron loss or noise.
On the other hand, in order to improve processibility, desirable insulating coating is shown below handles by coating.
In order to reduce the suffered tension force of steel plate, effectively: make the thickness of oxide compound and insulating coating little, use the low material of storing temperature, and use thermal expansivity or the little insulating coating of Young's modulus as insulating coating material.
About the kind of insulating coating,, just have no particular limits as long as the tension force that applies is 5MPa or following.For example, organic resin coating or be suitable by half organic coating that organic resin and inorganic components constitute.As inorganic components, can enumerate a kind of being selected from phosphoric acid, phosphoric acid salt, chromic acid, chromic salt, dichromate, boric acid, silicate, silicon-dioxide and the aluminum oxide or 2 kinds or more than.The insulating coating that contains these organic resins, inhibition cut-out, stamping-out add the strain of cut-out in man-hour portion, and therefore the effect of the iron loss deterioration after preventing to process is arranged, and are suitable.
About the thickness of such organic resin coating or half organic resin coating, preferably 0.5 μ m or above, 5 μ m or following degree.Lower limit is from guaranteeing the aspect of layer insulation, and the upper limit is from lowering tension force and preventing that the aspect that the area occupied rate reduces from determining.
In addition, also can use by the coating that is selected from the unorganic glass matter that in phosphoric acid salt and chromic acid, chromic salt, dichromate, the boric acid a kind or 2 kinds or above composition constitute.Under the situation of unorganic glass matter coating, reach 5MPa or following in order to make tension force, preferably make storing temperature reach 400 ℃ or following, the thickness of coating, each face are 2 μ m or following.In order to improve thermotolerance, also can contain the silicon-dioxide of some amounts or the micropowder or the colloid of aluminum oxide.
Embodiment 1
Adopt continuous casting manufacturing to contain C:0.009%, Si:2.4%, Mn:0.02%, Al:0.012%, Se:3ppm, S:14ppm, O:10ppm and N:9ppm, all the other are essentially the bloom slab of the composition of Fe.This bloom slab rolls into the hot-rolled sheet of 3.0mm 1100 ℃ of heating 20 minutes by hot rolling.In the soaking temperature shown in the table 2, this hot-rolled sheet carried out 30 seconds hot-rolled sheet annealing after, carry out cold rollingly at 150 ℃, roll into the final thickness of slab of 0.35mm.At hydrogen: 75 volume %, nitrogen: 25 volume %, dew point: in 20 ℃ the atmosphere,, this cold-reduced sheet is implemented 10 seconds recrystallization annealing, make C be reduced to 10ppm at 930 ℃.This annealed sheet is at (50%N
2Carry out in+50%Ar) the mixed atmosphere rate of heating with 50 ℃/h be heated to 750 ℃, with the various rate of heating shown in the table 2 from 750 ℃ or abovely be heated to 950 ℃, then at 950 ℃ of finished products that keep 30 hours.Coating mixes the coating fluid of aluminum dichromate, emulsion resin, ethylene glycol formation on this finished products plate, toasts at 300 ℃, as sheet.
The magneticflux-density B of the sheet that obtains like this in L direction, C direction detection
50In addition, sheet is carried out stamping-out processing, make the EI iron core, measure its iron loss.Use the Laue X-ray diffraction method, measure the crystalline orientation of sheet in 100mm * 280mm scope.The position of obtaining cube orientation and Gauss's orientation from the crystalline orientation measurement result is 20 ° of area occupation ratios with interior crystal grain to difference.In table 2, represent resulting result simultaneously.
According to table 2 as can be known, No.1～6 obtain extremely good EI iron loss unshakable in one's determination.The rolling direction of No.1～6 (L direction) and perpendicular to the magneticflux-density B of rolling direction (C direction)
50Be B simultaneously
50〉=1.70T, and the ratio B of magneticflux-density
50(L)/B
50(C) satisfy 1.005 or above, 1.100 or below.In addition, in No.1～6, from the position of cube orientation to difference be 20 ° satisfy with the area occupation ratios of interior crystal grain 50% or above, 80% or below, and from the position of Gauss's orientation to difference be 20 ° with the area occupation ratios satisfied 6% of interior crystal grain or above, 20% or below.
Embodiment 2
Adopt continuous casting manufacturing to contain C:0.022%, Si:3.3%, Mn:0.52%, Al:0.0050%, Se:5ppm, S:5ppm, O:15ppm and N:10ppm, all the other are essentially the bloom slab of the composition of Fe.This bloom slab rolls into the hot-rolled sheet of 3.2mm 1200 ℃ of heating 20 minutes by hot rolling.This hot-rolled sheet carries out 20 seconds hot-rolled sheet annealing at 1050 ℃.This hot-roll annealing plate carries out cold rolling at normal temperature, roll into the interior thickness of 1.5mm, then 1000 ℃ of process annealings of carrying out 30 seconds, follows the cold rolling final thickness of slab that rolls into 0.28mm with normal temperature.This cold-reduced sheet is at hydrogen: 75 volume %, nitrogen: 25 volume %, dew point: in 40 ℃ the atmosphere, carry out 30 seconds recrystallization annealing of soaking at 850 ℃, make C be reduced to 10ppm.This recrystallization annealing plate in argon atmospher, with 70 ℃/h be heated to 750 ℃, with 10 ℃/h from 750 ℃ be heated to 820 ℃, at 820 ℃ of finished products that keep 100 hours.Coating mixes the coating fluid of aluminum dichromate, emulsion resin, ethylene glycol formation on this finished products plate, toasts at 300 ℃, as sheet.Sheet is carried out the mensuration identical with embodiment 1.The result who is obtaining shown in the table 3.
As shown in table 3, according to method of the present invention, can access the magneticflux-density B of L direction and C direction
50Be B simultaneously
50〉=1.70T and B
50(L)/B
50(C) satisfy 1.005 or above, 1.100 or following, be suitable as the EI electrical sheet with material unshakable in one's determination most.
In addition, such electrical sheet form from cube position of ((100) (001)) orientation to difference be 20 ° of area occupation ratios with interior crystal grain satisfy 50% above 80% or following and also from the position of Gauss ((110) (001)) orientation to difference be 20 ° with the area occupation ratios satisfied 6% of interior crystal grain or above 20% or following texture.
Embodiment 3
The bloom slab that various one-tenth are grouped into shown in the table 4 rolls into the thick hot-rolled sheet of 2.8mm by hot rolling after 1160 ℃ of heating.This hot-rolled sheet carries out 60 seconds hot-rolled sheet of soaking annealing at 1100 ℃, carries out cold rollingly 250 ℃ temperature, rolls into the final thickness of slab of 0.50mm.This cold-reduced sheet is at hydrogen: 75 volume %, nitrogen: 25 volume %, dew point: in 35 ℃ the atmosphere, carry out 20 seconds the recrystallization annealing that takes into account decarburization of soaking at 900 ℃, make the C in the steel plate be reduced to 20ppm.This recrystallization annealing plate is warming up to 750～950 ℃ with 2.5 ℃/h in nitrogen atmosphere, carry out finished products at 950 ℃.The coating fluid that coating mixed phosphate aluminium, potassium bichromate, boric acid form on this finished products plate toasts at 300 ℃, as sheet.This sheet is carried out the mensuration identical with embodiment 1.What obtain the results are shown in the table 5.
As shown in table 5, satisfy the magneticflux-density of composition compositing range of the present invention and L direction and C direction and compare B
50(L)/B
50(C) satisfy No.1～8 of OK range, in the EI iron core, obtain good iron loss.
Adopt the bloom slab that various one-tenth are grouped into shown in the continuous casting manufacturing table 6.This bloom slab after 20 minutes, rolls into 2.6mm thick hot-rolled sheet by hot rolling 1100 ℃ of heating.This hot-rolled sheet rolls into the final thickness of slab of 0.35mm by warm-rolling after 1100 ℃ of hot-rolled sheets that carried out 60 seconds are annealed.This milled sheet is at nitrogen: 50 volume %, hydrogen: in the atmosphere of 50 volume %, carry out annealing temperature and be 900 ℃ recrystallization annealing, carry out finished products again, as sheet.
The magneticflux-density B of the sheet that obtains like this in L direction and C direction detection
50In addition, use the Laue X-ray diffraction method, obtaining the position that is orientated with (100) (001) is 15 ° of area occupation ratios with interior crystal grain to difference.And, use laser Doppler method to measure rolling direction and perpendicular to the magnetostriction of rolling direction.
The sheet stamping-out is become diameter: 150mm's is circular, 750 ℃ of stress relievings of carrying out 2 hours.This stamping-out annealed sheet is stacked, make iron core, measure noise.Should iron core excitatory with frequency 50Hz, magnetizing flux density: 1.5T, use be installed in unshakable in one's determination directly over the speaker of position of 100mm carry out noise measuring.The result who obtains is shown in Table 6 in the lump.
Clearly illustrate that as table 6, use bloom slab No.1～4 of satisfying scope in the composition of the present invention, the sheet of under suitable recrystallization annealing condition, making, magnetic, Magnetostrictive Properties and noise properties are all good.
Embodiment 5
Adopt continuous casting manufacturing to contain C:220ppm, Si:3.25 weight %, Mn:0.16 weight %, Al:80ppm, Se:12ppm, S:11ppm, N:9ppm and O:13ppm, all the other are essentially Fe bloom slab that form, that do not contain inhibitor.This bloom slab rolls into the hot-rolled sheet of regulation thickness of slab 1100 ℃ of heating 20 minutes by hot rolling.This hot-rolled sheet is carrying out hot-rolled sheet annealing, after this rolls into the final thickness of 0.35mm by warm-rolling.This milled sheet is carried out recrystallization annealing under the various conditions shown in the table 7, carry out finished products in nitrogen atmosphere.The sheet that obtains like this carries out identical investigation with embodiment 4.The result who obtains is shown in Table 7 in the lump.
Clearly illustrate that as table 7, in annealing temperature: the nitrogen amount in 800～1000 ℃, atmosphere: carry out No.4～6,8～12 of recrystallization annealing, 14～15 sheet under 5 volume % or the above condition, magnetic, Magnetostrictive Properties, noise properties are all good.
Adopt continuous casting manufacturing to contain Si:3.1 weight %, C:0.012 weight %, Mn:0.1 weight %, Al:0.009 weight %, N:10ppm, O:13ppm, S:5ppm and Se:4ppm, all the other are essentially the bloom slab that Fe forms.This bloom slab carries out hot rolling, rolls into thickness: the hot-rolled sheet of 2.7mm.This hot-rolled sheet carries out 60 seconds hot-rolled sheet of soaking annealing at 1140 ℃, carries out cold rollingly again at 270 ℃, rolls into the final thickness of slab of 0.35mm.Final cold rolling preceding average crystal grain diameter is 280 μ m.This cold-reduced sheet is at 40%H
2, 60%N
2, dew point: in 50 ℃ the atmosphere, carry out 30 seconds recrystallization annealing of soaking, make the C in the steel be reduced to 0.002 weight % at 920 ℃.After this, with the annealing separation agent that 3: 1 mixed SiO 2 powder and alumina powder form, coil into the coiled sheet shape, carry out finished products in the coating of the surface electrostatic of this recrystallization annealing plate.Be warming up to 800 ℃, be warming up to 950 ℃ from 800 ℃ from normal temperature with 5 hours with 25 hours, again 950 ℃ keep 36 hours after, by the cold finished products that carries out of stove.At this moment, make the steam vapour amount in the atmosphere that imports in the stove carry out various variations, be controlled at the oxide amount that surface of steel plate forms.With the annealing separation agent of this finished products plate clean remove after, on one side steel band is applied tension force, on one side at 5%H
2-95%N
2In the atmosphere, 840 ℃ of planarization annealing of carrying out 60 seconds.Be formed on half organic coating that disperses organic resin in the inorganic components that is made of magnesium bichromate, boric acid on this planarization annealed sheet surface, the thickness that makes coating is 1.0 μ m.By above-mentioned process, obtain: cube electrical sheet that orientation accumulative secondary recrystallization crystal grain constitutes of about 20mm by particle diameter.
The magneticflux-density B of the sheet that obtains like this in L direction and C direction detection
50Then, use the EI unshakable in one's determination sample of stamping-out processing, the iron loss when measuring 1.5T, 50Hz by this steel plate manufacturing EI-48 type.The relation of the oxygen density of resulting result of expression and surface of steel plate in Fig. 8.As shown in Figure 8, pressing oxygen conversion amount, the oxide amount of surface of steel plate is suppressed at 1.0g/m
2Or in following No.1～3, the EI iron core have excellent iron loss properties the deterioration in characteristics after can suppressing to process.
Embodiment 7
Making in the same manner with embodiment 6, be 0.4g/m by the oxide amount on oxygen conversion dimension plate surface
2The steel plate that constitutes of the secondary recrystallization crystal grain of cube orientation on, the be covered coating of inanimate matter of variable thickness ground.This coating is a mixed colloidal silicon-dioxide in the solution that is made of aluminum phosphate, potassiumchromate, boric acid, forms the tunicle of thickness 1 μ m 800 ℃ of bakings.At this, if increase the content of colloidal silica, the thermal expansivity of coating just diminishes, and the tension force of giving on steel plate increases.Apply the stress under compression of 0～6MPa on this steel plate, measure magnetostriction, the stress under compression when sharply increasing with magnetostriction is as the tension force that steel plate is applied.
Shown in the table 9 at the L of steel plate, the magneticflux-density B of C direction detection
50, use that the Epstein cores-loss test measures carry out iron loss result when excitatory along L direction, C direction with 1.5T, 50Hz.
Clearly illustrate that as table 9 if the tension force that steel plate is given surpasses 5Mpa, the iron loss of C direction is deterioration significantly, this is not good.Relative therewith, the tension force size of being given is if 5MPa or following, particularly 3MPa or following, and the iron loss deterioration of C direction just becomes minimum, obtains good iron loss characteristic.
Half organic coating that do not add colloidal silica, uses in the coating of 350 ℃ of bakings or in embodiment 6 is given tension force hardly to steel plate.Therefore, it is average that the iron loss after coating is covered also obtains the L direction: 1.22W/kg, the C direction is average: the good result of 1.45W/kg.
Become to be grouped into the bloom slab of formation shown in the his-and-hers watches 10, condition is carried out various variations, carry out hot rolling, hot-rolled sheet annealing, cold rolling, recrystallization annealing and finished products, make the thick electrical sheet of 0.35mm.This finished products plate carries out planarization annealing and the insulating coating lining is handled.
Use the Epstein cores-loss test to estimate these samples in 1.5T, iron loss when the 50Hz alternating current is excitatory.Iron loss measure to be used the Epstein iron loss sample that cuts along L direction and C direction each half.From the various samples that obtain of creating conditions of same component steel, the measurement result that iron loss is minimum is shown in Table 10.In addition, at the magneticflux-density B of the L of identical sample of creating conditions direction and C direction detection
50Also be shown in Table 10.
As shown in table 10, No.1～5 of satisfying composition compositing range of the present invention all obtain good iron loss.Relative therewith, any disengaging OK range person of C, Mn, Al, S, Se, O, N, iron loss all increases, and all is inappropriate as core material.
Embodiment 9
, the secondary recrystallization of the steel that only changes Al content is begun temperature investigate as basal component with the No.1 composition of table 10.Cut length from proceeding to recrystallization annealing steel plate before: the sample of 400mm, wide: 50mm is incorporated with the electric furnace of 800～1200 ℃ temperature head, and keeps 50 hours.After the maintenance, carry out macroetching,, estimate secondary recrystallization and begin temperature by relatively more corresponding temperature with having or not secondary recrystallization.What obtain the results are shown in the table 11.
As shown in table 11, reach 0.02 weight % or following by making Al, cause secondary recrystallization.Especially, during less than 0.01 weight %, secondary recrystallization begins the temperature step-down at Al content, becomes possibility at the finished products of lower temperature.Therefore, Al content being defined as less than 0.01 weight %, is extremely favourable to lowering the oxide amount that generates at surface of steel plate.
In embodiment 1～3, the purposes as electrical sheet of the present invention has been described, make the situation of EI iron core, but purposes of the present invention not necessarily only limits to the miniature transformer as EI is unshakable in one's determination.
Electrical sheet of the present invention, rolling direction and especially better than non-oriented electromagnetic steel sheet perpendicular to the magnetic of rolling direction even therefore use, also can access high efficient in common motor.
Moreover steel of the present invention is compared with the double orientation electrical sheet according to the conventional art manufacturing, does not use inhibitor as starting material, and does not need to implement transverse rolling as manufacturing processed.Therefore, though the magnetic of steel of the present invention is poorer slightly than double orientation electrical sheet in the past, has and to carry out mass-produced advantage with low cost.
According to the electrical sheet that the present invention obtains, to compare with in the past one-way oriented electric steel plate or double orientation electrical sheet, the anisotropy of magnetic is little.Therefore, as the direction of magnetic flux unshakable in one's determination inner change greatly miniature motor or the core material of generating usefulness be only.
And then, by not only improving rolling direction but also raising, can access the good electrical sheet of noise properties perpendicular to the Magnetostrictive Properties of rolling direction.Perhaps be suppressed at 1.0g/m by the oxide amount that converts by the oxygen amount the iron-based surface
2Or below, can access the little electrical sheet of deterioration in characteristics that causes by processing.
Table 1
| ???No. | Annealing temperature (℃) | The ratio of nitrogen (volume %) | Rolling direction and perpendicular to the magnetostriction sum λ of rolling direction p-p????(×10 -6) | The position that is orientated with (100) (001) is 15 ° of area occupation ratios with interior crystal grain (%) to difference |
| ????1 | ????800 | ????25 | ????7.9 | ????43.1 |
| ????2 | ????800 | ????100 | ????7.5 | ????32.7 |
| ????3 | ????850 | ????50 | ????6.8 | ????46.8 |
| ????4 | ????850 | ????100 | ????7.0 | ????39.5 |
| ????5 | ????900 | ????5 | ????6.8 | ????50.1 |
| ????6 | ????900 | ????50 | ????5.2 | ????68.2 |
| ????7 | ????900 | ????80 | ????6.1 | ????65.3 |
| ????8 | ????900 | ????100 | ????5.9 | ????60.2 |
| ????9 | ????950 | ????50 | ????5.8 | ????62.4 |
| ????10 | ????950 | ????100 | ????6.3 | ????58.5 |
| ????11 | ????1000 | ????50 | ????7.2 | ????53.1 |
| ????12 | ????1000 | ????100 | ????7.5 | ????35.4 |
Table 2
| ??No. | The annealing temperature of hot rolled steel sheet (℃) | Final finished annealed rate of heating (℃/h) | Magneticflux-density in the L direction: B 50(T) | Magneticflux-density in the C direction: B 50(T) | The ratio of magneticflux-density: B 50(L)/B 50(C) | The area occupation ratio of cubic grain (%) | The area occupation ratio of Gauss's crystal grain (%) | The iron loss of EI iron core: W 15/50????(W/kg) | Remarks |
| ??1 | ????975 | ????10 | ????1.903 | ????1.878 | ????1.013 | ????71 | ????13 | ????1.85 | Example of the present invention |
| ??2 | ????1075 | ????10 | ????1.923 | ????1.874 | ????1.026 | ????75 | ????11 | ????1.82 | Example of the present invention |
| ??3 | ????1125 | ????10 | ????1.914 | ????1.854 | ????1.032 | ????72 | ????9 | ????1.86 | Example of the present invention |
| ??4 | ????1175 | ????10 | ????1.923 | ????1.874 | ????1.026 | ????75 | ????11 | ????1.82 | Example of the present invention |
| ??5 | ????1100 | ????2.5 | ????1.933 | ????1.904 | ????1.015 | ????77 | ????15 | ????1.78 | Example of the present invention |
| ??6 | ????1100 | ????15 | ????1.893 | ????1.871 | ????1.012 | ????68 | ????11 | ????1.87 | Example of the present invention |
| ??7 | ????700 | ????5 | ????1.863 | ????1.612 | ????1.156 | ????25 | ????45 | ????2.45 | Comparative example |
| ??8 | ????1250 | ????5 | ????1.833 | ????1.674 | ????1.094 | ????35 | ????3 | ????2.32 | Comparative example |
| ??9 | ????1100 | ????50 | ????1.883 | ????1.685 | ????1.117 | ????22 | ????41 | ????2.30 | Comparative example |
Table 3
| Magneticflux-density in the L direction: B 50(T) | Magneticflux-density in the C direction: B 50(T) | The ratio of magneticflux-density: B 50(L)/ B 50(C) | The area occupation ratio of cubic grain (%) | The area occupation ratio of Gauss's crystal grain (%) | The iron loss of EI iron core: W 15/50?(W/kg) | Remarks |
| ??1.913 | ??1.870 | ?1.023 | ????75 | ????11 | ??1.95 | Example of the present invention |
Table 4
| ??No. | C (weight %) | Si (weight %) | Mn (weight %) | Ni (weight %) | Sn (weight %) | Sb (weight %) | Cu (weight %) | Mo (weight %) | Cr (weight %) | ????O ??(ppm) | ????N ??(ppm) | ????Al ???(ppm) | ????Se ???(ppm) | ????S ??(ppm) |
| ????1 | ????0.043 | ????3.35 | ????0.15 | ????0.50 | Trace | Trace | Trace | Trace | Trace | ????13 | ????8 | ????50 | ????5 | ????15 |
| ????2 | ????0.028 | ????3.20 | ????0.11 | ????0.25 | Trace | Trace | Trace | Trace | Trace | ????15 | ????14 | ????90 | ????3 | ????9 |
| ????3 | ????0.011 | ????3.24 | ????0.10 | Trace | Trace | Trace | Trace | Trace | Trace | ????11 | ????12 | ????160 | ????4 | ????7 |
| ????4 | ????0.053 | ????3.43 | ????0.35 | Trace | ????0.10 | Trace | Trace | Trace | Trace | ????11 | ????13 | ????70 | ????3 | ????23 |
| ????5 | ????0.005 | ????3.15 | ????0.03 | Trace | Trace | ????0.03 | Trace | Trace | Trace | ????10 | ????10 | ????20 | ????2 | ????8 |
| ????6 | ????0.032 | ????3.25 | ????0.50 | Trace | Trace | Trace | ????0.20 | Trace | Trace | ????18 | ????18 | ????30 | ????5 | ????19 |
| ????7 | ????0.040 | ????3.59 | ????0.35 | Trace | Trace | Trace | Trace | ????0.05 | Trace | ????11 | ????7 | ????90 | ????6 | ????16 |
| ????8 | ????0.063 | ????3.30 | ????0.05 | Trace | Trace | Trace | Trace | Trace | ????0.30 | ????9 | ????17 | ????40 | ????17 | ????15 |
| ????9 | ????0.001 | ????3.30 | ????0.21 | Trace | Trace | Trace | Trace | Trace | Trace | ????10 | ????21 | ????150 | ????3 | ????14 |
| ????10 | ????0.150 | ????3.10 | ????0.34 | Trace | Trace | Trace | Trace | Trace | Trace | ????17 | ????11 | ????50 | ????5 | ????9 |
| ????11 | ????0.025 | ????3.35 | ????3.05 | Trace | Trace | Trace | Trace | Trace | Trace | ????15 | ????22 | ????20 | ????3 | ????16 |
| ????12 | ????0.040 | ????3.33 | ????0.12 | Trace | Trace | Trace | Trace | Trace | Trace | ????10 | ????10 | ????340 | ????3 | ????11 |
| ????13 | ????0.033 | ????3.20 | ????0.19 | Trace | Trace | Trace | Trace | Trace | Trace | ????60 | ????14 | ????20 | ????5 | ????10 |
| ????14 | ????0.015 | ????3.39 | ????0.14 | Trace | Trace | Trace | Trace | Trace | Trace | ????15 | ????65 | ????30 | ????4 | ????9 |
| ????15 | ????0.035 | ????3.40 | ????0.15 | Trace | Trace | Trace | Trace | Trace | Trace | ????8 | ????10 | ????40 | ????90 | ????8 |
| ????16 | ????0.050 | ????3.20 | ????0.22 | Trace | Trace | Trace | Trace | Trace | Trace | ????6 | ????13 | ????50 | ????4 | ????110 |
Table 5
| ?No. | Magneticflux-density in the L direction: B 50(L)(T) | Magneticflux-density in the C direction: B 50(C)(T) | The ratio of magneticflux-density: B 50(L)/B 50(C) | The area occupation ratio of cubic grain (%) | The area occupation ratio of Gauss's crystal grain (%) | The iron loss of EI iron core: W 15/50(W/kg) | Remarks |
| ??1 | ????1.907 | ????1.845 | ????1.034 | ????70 | ????10 | ????1.50 | Example of the present invention |
| ??2 | ????1.902 | ????1.9871 | ????1.017 | ????76 | ????14 | ????1.44 | Example of the present invention |
| ??3 | ????1.886 | ????1.854 | ????1.017 | ????65 | ????8 | ????1.56 | Example of the present invention |
| ??4 | ????1.856 | ????1.833 | ????1.013 | ????63 | ????11 | ????1.45 | Example of the present invention |
| ??5 | ????1.900 | ????1.883 | ????1.009 | ????77 | ????7 | ????1.50 | Example of the present invention |
| ??6 | ????1.878 | ????1.848 | ????1.016 | ????66 | ????13 | ????1.48 | Example of the present invention |
| ??7 | ????1.865 | ????1.824 | ????1.022 | ????65 | ????8 | ????1.52 | Example of the present invention |
| ??8 | ????1.858 | ????1.828 | ????1.016 | ????55 | ????10 | ????1.48 | Example of the present invention |
| ??9 | ????1.802 | ????1.632 | ????1.105 | ????33 | ????18 | ????2.33 | Comparative example |
| ??10 | ????1.788 | ????1.603 | ????1.154 | ????23 | ????10 | ????2.45 | Comparative example |
| ??11 | ????1.698 | ????1.655 | ????1.026 | ????33 | ????5 | ????2.41 | Comparative example |
| ??12 | ????1.733 | ????1.654 | ????1.048 | (secondary recrystallization defective) | ????2.75 | Comparative example | |
| ??13 | ????1.666 | ????1.604 | ????1.039 | (secondary recrystallization defective) | ????2.85 | Comparative example | |
| ??14 | ????1.709 | ????1.601 | ????1.067 | (secondary recrystallization defective) | ????2.75 | Comparative example | |
| ??15 | ????1.701 | ????1.621 | ????1.049 | (secondary recrystallization defective) | ????2.83 | Comparative example | |
| ??16 | ????1.698 | ????1.631 | ????1.041 | (secondary recrystallization defective) | ????2.80 | Comparative example | |
Table 6
| ? ? ? ???No. | C (weight %) | Si (weight %) | Mn (weight %) | ? ? ??Al (Ppm) | ? ? ??Se ?(ppm) | ? ? ????S ???(ppm) | ? ? ??O (ppm) | ? ? ??N (ppm) | ? ? B 50(L) ? ?(T) | ? ? B 50(C) ? ??(T) | ? ? ?B 50(L)/ ?B 50(C) | With, (100) position of (01) orientation is 15 ° of area occupation ratios with interior crystal grain to difference, (%) | Rolling direction and perpendicular to the magnetostrictive and (λ of rolling direction p-p：× ???10 -6) | Noise (decibel) |
| ??1 | ??0.023 | ??3.14 | ??0.15 | ??80 | ??11 | ??11 | ??20 | ??7 | ??1.91 | ??1.83 | ??1.044 | ????51.5 | ????7.5 | ??38.4 |
| ??2 | ??0.032 | ??3.21 | ??0.55 | ??20 | ??8 | ??12 | ??17 | ??9 | ??1.90 | ??1.82 | ??1.044 | ????64.0 | ????7.0 | ??35.6 |
| ??3 | ??0.024 | ??3.29 | ??0.10 | ??60 | ??11 | ??8 | ??13 | ??18 | ??1.90 | ??1.81 | ??1.050 | ????48.7 | ????7.7 | ??37.7 |
| ??4 | ??0.018 | ??3.10 | ??0.30 | ??130 | ??12 | ??7 | ??11 | ??12 | ??1.91 | ??1.84 | ??1.038 | ????65.8 | ????5.0 | ??33.9 |
| ??5 | ??0.120 | ??3.30 | ??0.03 | ??110 | ??8 | ??12 | ??13 | ??12 | ??1.92 | ??1.59 | ??1.208 | ????8.3 | ????10.4 | ??52.1 |
| ??6 | ??0.010 | ??3.25 | ??0.12 | ??500 | ??5 | ??7 | ??12 | ??10 | ??1.92 | ??1.63 | ??1.178 | ????16.4 | ????12.4 | ??46.1 |
| ??7 | ??0.019 | ??3.22 | ??0.20 | ??20 | ??130 | ??10 | ??9 | ??11 | ??1.94 | ??1.58 | ??1.228 | ????3.5 | ????13.8 | ??55.0 |
| ??8 | ??0.022 | ??3.21 | ??0.09 | ??30 | ??9 | ??65 | ??15 | ??14 | ??1.93 | ??1.60 | ??1.206 | ????6.7 | ????15.6 | ??53.2 |
| ??9 | ??0.030 | ??3.19 | ??0.10 | ??20 | ??10 | ??5 | ??55 | ??14 | ??1.92 | ??1.61 | ??1.193 | ????12.1 | ????13.8 | ??51.6 |
| ??10 | ??0.022 | ??3.24 | ??0.28 | ??90 | ??7 | ??11 | ??15 | ??78 | ??1.91 | ??1.63 | ??1.172 | ????13.5 | ????10.4. | ??47.6 |
Table 7
| ???No. | Annealing temperature (℃) | The ratio of nitrogen (volume %) | ????B 50????(L) ????(T) | ????B 50????(C) ????(T) | ????B 50(L) ????/ ????B 50(C) | The chip area rate (%) of cube orientation | Rolling direction and perpendicular to the magnetostrictive and λ of rolling direction p-p(×10 -6) | Noise (decibel) |
| ????1 | ????700 | ????50 | ????1.79 | ????1.73 | ????1.035 | ????3.6 | ????15.6 | ????51.7 |
| ????2 | ????750 | ????50 | ????1.82 | ????1.76 | ????1.034 | ????9.1 | ????13.8 | ????52.4 |
| ????3 | ????800 | ????0 | ????1.83 | ????1.75 | ????1.046 | ????5.2 | ????12.9 | ????48.6 |
| ????4 | ????800 | ????50 | ????1.91 | ????1.82 | ????1.049 | ????45.6 | ????7.7 | ????39.7 |
| ????5 | ????800 | ????80 | ????1.91 | ????1.81 | ????1.055 | ????47.2 | ????6.8 | ????37.6 |
| ????6 | ????850 | ????50 | ????1.92 | ????1.85 | ????1.038 | ????60.3 | ????6.5 | ????36.9 |
| ????7 | ????900 | ????0 | ????1.78 | ????1.73 | ????1.029 | ????7.5 | ????9.0 | ????46.2 |
| ????8 | ????900 | ????25 | ????1.92 | ????1.86 | ????1.032 | ????52.3 | ????7.1 | ????38.1 |
| ????9 | ????900 | ????50 | ????1.93 | ????1.87 | ????1.032 | ????68.4 | ????5.0 | ????34.5 |
| ????10 | ????900 | ????80 | ????1.93 | ????1.87 | ????1.032 | ????61.2 | ????6.2 | ????36.0 |
| ????11 | ????900 | ????100 | ????1.93 | ????1.88 | ????1.027 | ????62.3 | ????7.1 | ????34.0 |
| ????12 | ????950 | ????50 | ????1.92 | ????1.84 | ????1.043 | ????65.6 | ????6.8 | ????37.7 |
| ????13 | ????1000 | ????0 | ????1.84 | ????1.76 | ????1.045 | ????12.3 | ????11.1 | ????47.3 |
| ????14 | ????1000 | ????50 | ????1.90 | ????1.82 | ????1.044 | ????69.6 | ????7.0 | ????38.3 |
| ????15 | ????1000 | ????80 | ????1.90 | ????1.81 | ????1.050 | ????62.7 | ????6.9 | ????36.7 |
| ????16 | ????1050 | ????50 | ????1.79 | ????1.72 | ????1.041 | ????21.3 | ????14.4 | ????52.1 |
Table 8
| ???No. | Oxide amount (g/m 2) | ???B 50(L) ????(T) | ???B 50(C) ????(T) | ???B 50(L) ???/ ???B 50(C) | Iron loss: W 15/50????(W/kg) |
| ????1 | ????0.1 | ????1.92 | ????1.83 | ????1.049 | ????1.85 |
| ????2 | ????0.4 | ????1.92 | ????1.83 | ????1.049 | ????1.89 |
| ????3 | ????1.0 | ????1.91 | ????1.81 | ????1.055 | ????1.93 |
| ????4 | ????1.3 | ????1.90 | ????1.80 | ????1.056 | ????2.22 |
| ????5 | ????2.1 | ????1.90 | ????1.79 | ????1.061 | ????2.35 |
Table 9
| ?No. | Tension force (MPa) | ???B 50(L) ????(T) | ??B 50(C) ????(T) | ??B 50(L) ??/ ??B 50(C) | Iron loss in the L direction: W 15/50(W/kg) | Iron loss in the C direction: W 15/50(W/kg) |
| ??1 | ????0.7 | ??1.93 | ????1.85 | ??1.043 | ??1.24 | ??1.43 |
| ??2 | ????1.1 | ??1.93 | ????1.85 | ??1.043 | ??1.23 | ??1.44 |
| ??3 | ????2.2 | ??1.94 | ????1.85 | ??1.049 | ??1.20 | ??1.46 |
| ??4 | ????3.0 | ??1.94 | ????1.83 | ??1.060 | ??1.18 | ??1.51 |
| ??5 | ????3.7 | ??1.95 | ????1.82 | ??1.071 | ??1.10 | ??1.65 |
| ??6 | ????4.8 | ??1.95 | ????1.80 | ??1.083 | ??1.00 | ??1.81 |
| ??7 | ????5.2 | ??1.95 | ????1.77 | ??1.102 | ??0.99 | ??2.15 |
| ??8 | ????6.4 | ??1.95 | ????1.75 | ??1.114 | ??0.92 | ??2.63 |
Table 10
| ????No. | Si (weight %) | C (weight %) | Mn (weight %) | ????Al ???(ppm) | ????S ??(ppm) | ??????Se ????(ppm) | ??????O ????(ppm) | ????N ??(ppm) | ???B 50(L) ????(T) | ???B 50(C) ????(T) | ???B 50(L) ???/ ???B 50(C) | Iron loss: W 15/50??(W/kg) |
| ????1 | ????3.1 | ????0.012 | ????0.10 | ????0.009 | ????5 | ????4 | ????13 | ????10 | ????1.92 | ????1.83 | ????1.049 | ???1.35 |
| ????2 | ????3.2 | ????0.004 | ????0.10 | ????0.008 | ????4 | ????4 | ????15 | ????12 | ????1.92 | ????1.78 | ????1.079 | ???1.42 |
| ????3 | ????3.2 | ????0.075 | ????0.09 | ????0.007 | ????6 | ????3 | ????14 | ????11 | ????1.94 | ????1.77 | ????1.096 | ???1.44 |
| ????4 | ????3.1 | ????0.010 | ????0.11 | ????0.018 | ????3 | ????8 | ????12 | ????10 | ????1.92 | ????1.82 | ????1.055 | ???1.49 |
| ????5 | ????3.1 | ????0.012 | ????2.80 | ????0.005 | ????8 | ????6 | ????16 | ????11 | ????1.90 | ????1.81 | ????1.050 | ???1.39 |
| ????6 | ????3.2 | ????0.090 | ????0.10 | ????0.009 | ????6 | ????3 | ????12 | ????10 | ????1.98 | ????1.58 | ????1.253 | ???1.82 |
| ????7 | ????3.1 | ????0.011 | ????3.40 | ????0.008 | ????6 | ????6 | ????14 | ????11 | ????1.77 | ????1.73 | ????1.023 | ???2.53 |
| ????8 | ????3.1 | ????0.012 | ????0.11 | ????0.024 | ????6 | ????6 | ????14 | ????11 | ????1.76 | ????1.72 | ????1.023 | ???2.34 |
| ????9 | ????3.2 | ????0.012 | ????0.10 | ????0.009 | ????34 | ????2 | ????14 | ????10 | ????1.81 | ????1.73 | ????1.046 | ???1.93 |
| ????10 | ????3.3 | ????0.009 | ????0.11 | ????0.007 | ????7 | ????35 | ????12 | ????15 | ????1.75 | ????1.69 | ????1.036 | ???1.89 |
| ????11 | ????3.3 | ????0.010 | ????0.10 | ????0.009 | ????6 | ????4 | ????37 | ????13 | ????1.73 | ????1.69 | ????1.024 | ???1.88 |
| ????12 | ????3.1 | ????0.014 | ????0.10 | ????0.007 | ????7 | ????5 | ????12 | ????33 | ????1.63 | ????1.76 | ????1.040 | ???2.13 |
Table 11
| ??No. | Al content (weight %) | ??B 50(L) ????(T) | ??B 50(C) ????(T) | ???B 50(L) ????/ ???B 50(C) | Secondary recrystallization begin temperature (℃) |
| ????1 | ????0.002 | ????1.92 | ????1.83 | ????1.049 | ????825 |
| ????2 | ????0.005 | ????1.91 | ????1.80 | ????1.061 | ????835 |
| ????3 | ????0.007 | ????1.91 | ????1.81 | ????1.055 | ????845 |
| ????4 | ????0.009 | ????1.93 | ????1.82 | ????1.060 | ????853 |
| ????5 | ????0.010 | ????1.93 | ????1.81 | ????1.066 | ????925 |
| ????6 | ????0.018 | ????1.90 | ????1.79 | ????1.061 | ????973 |
| ????7 | ????0.024 | ????1.79 | ????1.71 | ????1.047 | No secondary recrystallization |
Claims (14)
1. electrical sheet is characterized in that, contains Si:2.0～8.0 weight %, Mn:0.005～3.0 weight %, Al:0.0010～0.020 weight %, and all the other come down to the composition of Fe, the magneticflux-density B of rolling direction
50(L) with perpendicular to the magneticflux-density B of rolling direction
50(C) all be 1.70T or more than, and B
50(L)/B
50(C) be 1.005 or above, 1.100 or below.
2. the described electrical sheet of claim 1, wherein, in steel plate, with the position of (100) (001) orientation to difference be 20 ° with interior secondary recrystallization crystal grain with 50% or above, 80% or following area occupation ratio exist, and with (110) (001) orientation to difference be 20 ° with interior secondary recrystallization crystal grain with 6% or above, 20% or following area occupation ratio exist.
3. claim 1 or 2 described electrical sheets, wherein, also contain at least a kind that is selected among Ni:0.01～1.50 weight %, Sn:0.01～1.50 weight %, Sb:0.005～0.50 weight %, Cu:0.01～1.50 weight %, Mo:0.005～0.50 weight % and the Cr:0.01～1.50 weight %.
4. the described electrical sheet of claim 1, wherein, the magnetostriction of the rolling direction during with the interchange of frequency 50Hz, excitatory one-tenth 1.5T and be 8 * 10 perpendicular to the magnetostriction sum of rolling direction
-6Or below.
5. the described electrical sheet of claim 4, wherein, with the position of (100) (001) orientation to difference be 15 ° with interior secondary recrystallization crystal grain with 30% or above, 70% or following area occupation ratio exist.
6. the described electrical sheet of claim 1, wherein, the oxide amount of the iron-based surface except insulating coating, converting by the oxygen amount, to be suppressed at each face be 1.0g/m
2Or below.
7. claim 1,4 or 6 described electrical sheets, wherein, the tension force that the oxide compound of iron-based surface and insulating coating cause steel plate is 5MPa or following.
8. the manufacture method of electrical sheet, it is characterized in that, hot rolling contains C:0.003～0.08 weight %, Si:2.0～8.0 weight %, Mn:0.005～3.0 weight %, the bloom slab of Al:0.0010～0.020 weight %, as required, this hot-rolled sheet is carried out hot-rolled sheet annealing 950～1200 ℃ or following temperature, to this hot-rolled sheet or hot-roll annealing plate carry out 1 time cold rolling or insert or above cold rolling for 2 times of process annealing, then this cold-reduced sheet is implemented recrystallization annealing, after this, as required, the coating annealing separation agent, this recrystallization annealing plate is heated to 800 ℃ or above humidity province carries out final finished annealing, again as required, this final finished annealed sheet is implemented planarization annealing, carry out the insulating coating lining subsequently and handle.
9. the manufacture method of the described electrical sheet of claim 8, wherein, with the unavoidable impurities S in the bloom slab and Se be suppressed at 100ppm (weight) or below, N and O be suppressed at 50ppm (weight) or below.
10. the manufacture method of claim 8 or 9 described electrical sheets, wherein, in final finished annealing 750 ℃ or above average rate of heating are 30 ℃/h or following.
11. the manufacture method of each described electrical sheet in the claim 8～10, wherein, bloom slab also contains at least a kind that is selected among 50 weight %, Sb:0.005～0.50 weight %, Cu:0.01～1.50 weight %, Mo:0.005～0.50 weight % of Ni:0.01～1.50 weight %, Sn:0.01～1. and the Cr:0.01～1.50 weight %.
12. the manufacture method of each described electrical sheet in the claim 8～11 wherein, is to implement recrystallization annealing under 5 volume % or the above atmosphere 800～1000 ℃ temperature ranges and in the nitrogen amount.
13. the manufacture method of each described electrical sheet in the claim 8～12, wherein, make final average crystal grain diameter before cold rolling reach 200 μ m or more than, final cold rolling draft reach 60% or above, 90% or below, at dew point :≤10 ℃, O
2In the atmosphere of≤0.1 volume %, carry out final finished annealing 1100 ℃ or following temperature.
14. the manufacture method of each described electrical sheet in the claim 813, wherein, lining is handled as insulating coating, with thickness 5 μ m or the organic resin coating of following lining or half organic coating that constitutes by organic resin and inorganic components, perhaps with the coating of thickness 2 μ m or following lining unorganic glass matter.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34422999A JP4123662B2 (en) | 1999-12-03 | 1999-12-03 | Electrical steel sheet for small electrical equipment and manufacturing method thereof |
| JP344229/1999 | 1999-12-03 | ||
| JP34599599A JP4075258B2 (en) | 1999-12-06 | 1999-12-06 | Manufacturing method of bi-directional electrical steel sheet |
| JP345995/1999 | 1999-12-06 | ||
| JP36461399A JP4123663B2 (en) | 1999-12-22 | 1999-12-22 | Electrical steel sheet and manufacturing method thereof |
| JP364613/1999 | 1999-12-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1308143A true CN1308143A (en) | 2001-08-15 |
| CN1124357C CN1124357C (en) | 2003-10-15 |
Family
ID=27341126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00137241A Expired - Lifetime CN1124357C (en) | 1999-12-03 | 2000-12-01 | Electric steel plate suitable for making small core and its manufacture |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6562473B1 (en) |
| EP (1) | EP1108794B1 (en) |
| KR (1) | KR100727333B1 (en) |
| CN (1) | CN1124357C (en) |
| DE (1) | DE60016149T2 (en) |
| TW (1) | TW486522B (en) |
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- 2000-11-30 TW TW089125509A patent/TW486522B/en not_active IP Right Cessation
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Also Published As
| Publication number | Publication date |
|---|---|
| KR100727333B1 (en) | 2007-06-12 |
| US6562473B1 (en) | 2003-05-13 |
| CN1124357C (en) | 2003-10-15 |
| EP1108794A1 (en) | 2001-06-20 |
| KR20010062073A (en) | 2001-07-07 |
| DE60016149D1 (en) | 2004-12-30 |
| EP1108794B1 (en) | 2004-11-24 |
| DE60016149T2 (en) | 2005-11-24 |
| TW486522B (en) | 2002-05-11 |
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